Question 1

What is the current water temperature at Grand Lake Saint Marys State Park?

Accepted Answer

The current water temperature at Grand Lake Saint Marys State Park is 71°F as of June 13, 1786. This temperature reading is based on our advanced satellite monitoring system and current data collection. Water temperature is a crucial factor for fishing success and water activities.

Question 2

How often is the Grand Lake Saint Marys State Park water temperature updated?

Accepted Answer

Water temperature data for Grand Lake Saint Marys State Park is updated daily through our satellite monitoring system. The last update was made on June 13, 1786. We use advanced thermal imaging and surface monitoring technology to provide accurate temperature readings.

Question 3

What activities are suitable for the current water temperature at Grand Lake Saint Marys State Park?

Accepted Answer

With the current water temperature of 71°F at Grand Lake Saint Marys State Park, conditions are ideal for fishing, boating, and moderate water activities. The temperature typically fluctuates 2-3 degrees throughout the day. This data is monitored via satellite and updated regularly to help you plan your lake activities.

Question 4

How good is the fishing at Grand Lake Saint Marys State Park with the current water temperature?

Accepted Answer

The current water temperature of 71°F at Grand Lake Saint Marys State Park is ideal for catching Bluegill, Channel catfish, Largemouth bass. These species are typically most active at this temperature range. For best results, fish during early morning or late evening hours when fish are most active. Always check local fishing regulations and licenses before fishing.

Question 5

What is Grand Lake Saint Marys State Park and what activities are available?

Accepted Answer

Grand Lake Saint Marys is a historically significant man-made reservoir located in Mercer County, Ohio, covering an area of 12,896acres. Originally constructed as a feeder reservoir for the Miami-Erie Canal, it was recognized for many years as the largest man-made reservoir in the world. Today, it serves as a popular recreational destination, providing visitors with a gateway to swimming, boating, camping, and fishing in one of Ohio's oldest state parks.

The lake's vast expanse of clear waters is perfect for water-based activities, such as swimming and boating. Visitors can explore the lake's numerous coves and inlets by boat or simply relax on the sandy beaches and take in the scenic views. The lake's calm waters are also ideal for fishing, with the lake offering a variety of fish species, including bass, catfish, and crappie. Fishing enthusiasts can rent boats or bring their own to enjoy a day on the lake.

Camping is another popular activity at Grand Lake St. Marys, with the state park offering a variety of camping facilities, including RV sites, cabins, and tent sites. Visitors can enjoy the park's numerous amenities, such as picnic areas, playgrounds, and hiking trails. The park also offers various educational programs, including guided nature walks and interpretive talks.

Grand Lake St. Marys has a rich history, and visitors can explore the lake's historical significance at the Mercer County Historical Museum. The museum features exhibits on the lake's construction, its role in the Miami-Erie Canal, and the history of the surrounding area.

In conclusion, Grand Lake St. Marys is a must-visit destination for those looking for a fun-filled outdoor adventure. The lake's clear waters, sandy beaches, and variety of recreational activities make it a perfect spot for families and groups. From swimming and boating to camping and fishing, there's something for everyone to enjoy at Grand Lake St. Marys.

Question 6

How big and deep is Grand Lake Saint Marys State Park?

Accepted Answer

Grand Lake Saint Marys State Park is a substantial body of water covering 12896.00 acres (20.15 square miles) with a maximum depth of 0.00 meters (0 feet). This size and depth make it ideal for various activities including and water recreation.

Question 7

What are the current conditions at Grand Lake Saint Marys State Park?

Accepted Answer

Current conditions at Grand Lake Saint Marys State Park as of June 19, 2026:
      Water temperature is 71°F, 
      weather is Drizzle, 
      and water clarity is typical for the season. 
      These conditions are regularly updated to help you plan your visit.

Question 8

When is the best time to fish at Grand Lake Saint Marys State Park?

Accepted Answer

The best fishing times at Grand Lake Saint Marys State Park vary by season:
      Spring (March-May): Spring fishing at the lake is excellent for Bluegill, Channel catfish, Largemouth bass, Northern pike, Sauger, Saugeye, Yellow perch. Focus on shallow areas warming up first, and use light tackle as fish become more active after winter.
      Summer (June-August): During summer months, fish are most active early morning and late evening. Look for Bluegill, Channel catfish, Largemouth bass, Northern pike, Sauger, Saugeye, Yellow perch in deeper, cooler waters during mid-day.
      Fall (September-November): Fall brings excellent fishing opportunities as Bluegill, Channel catfish, Largemouth bass, Northern pike, Sauger, Saugeye, Yellow perch feed heavily before winter. Focus on areas with falling water temperatures.
      Winter (December-February): Ice fishing is popular during winter months. Target Bluegill, Channel catfish, Largemouth bass, Northern pike, Sauger, Saugeye, Yellow perch in shallower bays and near structure, always ensuring safe ice conditions.
      Additionally, early morning and late evening typically offer the best fishing conditions.

Question 9

What facilities and access points are available at Grand Lake Saint Marys State Park?

Accepted Answer

Grand Lake Saint Marys State Park offers the following facilities and amenities:

Please note that some facilities may have seasonal hours or closures. Check current conditions and regulations before your visit.

Question 10

What types of fish can I catch at Grand Lake Saint Marys State Park?

Accepted Answer

Grand Lake Saint Marys State Park is home to Bluegill, Channel catfish, Largemouth bass, Northern pike, Sauger, Saugeye, Yellow perch. Each species has specific patterns and preferences that can help you plan your fishing trip effectively.

Question 11

What are the best techniques and times to catch Bluegill at Grand Lake Saint Marys State Park?

Accepted Answer

For Bluegill at Grand Lake Saint Marys State Park:
- Best seasons: Spring, Summer
- Active times: Morning, Afternoon
- Preferred water temperature: 69-75°F
- Typical depth: 1-10 feet in spring, 10-20 feet in summer
- Habitat: Lakes, Ponds, Streams
- Spawning season: Late Spring to Early Summer

Recommended techniques:
- Fishing methods: Bobber fishing, Casting
- Effective lures: Small jigs, Spinnerbaits
- Natural bait options: Worms, Crickets

Tackle recommendations:
- Rod: Ultralight power rod
- Reel: Spinning reel
- Line: 2-6 lb test

Question 12

What are the best techniques and times to catch Channel catfish at Grand Lake Saint Marys State Park?

Accepted Answer

For Channel catfish at Grand Lake Saint Marys State Park:
- Best seasons: Spring, Summer
- Active times: Night
- Preferred water temperature: 70-85°F
- Typical depth: 5-15 feet in spring, 15-30 feet in summer
- Habitat: Lakes, Rivers, Ponds
- Spawning season: Late Spring to Early Summer

Recommended techniques:
- Fishing methods: Bottom fishing
- Effective lures: None commonly used
- Natural bait options: Cut bait, Stink bait, Liver

Tackle recommendations:
- Rod: Medium-heavy to heavy power rod
- Reel: Baitcasting reel
- Line: 10-30 lb test

Question 13

What are the best techniques and times to catch Largemouth bass at Grand Lake Saint Marys State Park?

Accepted Answer

For Largemouth bass at Grand Lake Saint Marys State Park:
- Best seasons: Spring, Fall
- Active times: Dawn, Dusk
- Preferred water temperature: 65-80°F
- Typical depth: Shallow in spring/fall, deeper in summer
- Habitat: Lakes, Ponds, Rivers, Reservoirs
- Spawning season: Late Spring

Recommended techniques:
- Fishing methods: Pitching and flipping, Trolling, Casting
- Effective lures: Plastic worms, Crankbaits, Spinnerbaits
- Natural bait options: Shiners, Frogs, Worms

Tackle recommendations:
- Rod: Medium-heavy power rod
- Reel: Baitcasting reel
- Line: 10-20 lb test

Question 14

What are the best techniques and times to catch Northern pike at Grand Lake Saint Marys State Park?

Accepted Answer

For Northern pike at Grand Lake Saint Marys State Park:
- Best seasons: Spring, Fall
- Active times: Morning, Afternoon
- Preferred water temperature: 55-70°F
- Typical depth: 3-12 feet in spring, 10-25 feet in summer
- Habitat: Lakes, Rivers, Marshes
- Spawning season: Early Spring

Recommended techniques:
- Fishing methods: Casting, Trolling
- Effective lures: Spoons, Spinners, Swimbaits
- Natural bait options: Live fish

Tackle recommendations:
- Rod: Medium-heavy to heavy rod
- Reel: Spinning or baitcasting reel
- Line: 20-40 lb test

Question 15

What are the best techniques and times to catch Sauger at Grand Lake Saint Marys State Park?

Accepted Answer

For Sauger at Grand Lake Saint Marys State Park:
- Best seasons: Spring, Fall
- Active times: Morning, Evening
- Preferred water temperature: 45-65°F
- Typical depth: 10-30 feet in summer, shallower in spring
- Habitat: Rivers, Large streams
- Spawning season: Spring

Recommended techniques:
- Fishing methods: Jigging, Trolling
- Effective lures: Jigs, Crankbaits
- Natural bait options: Minnows, Worms

Tackle recommendations:
- Rod: Medium power rod
- Reel: Spinning reel
- Line: 6-12 lb test

Question 16

What are the best techniques and times to catch Saugeye at Grand Lake Saint Marys State Park?

Accepted Answer

For Saugeye at Grand Lake Saint Marys State Park:
- Best seasons: Spring, Fall
- Active times: Dawn, Dusk
- Preferred water temperature: 50-70°F
- Typical depth: 5-25 feet in summer, shallower in spring
- Habitat: Lakes, Rivers
- Spawning season: Spring

Recommended techniques:
- Fishing methods: Jigging, Trolling, Casting
- Effective lures: Jigs, Spinnerbaits, Crankbaits
- Natural bait options: Minnows, Nightcrawlers

Tackle recommendations:
- Rod: Medium power rod
- Reel: Spinning reel
- Line: 6-12 lb test

Question 17

What are the best techniques and times to catch Yellow perch at Grand Lake Saint Marys State Park?

Accepted Answer

For Yellow perch at Grand Lake Saint Marys State Park:
- Best seasons: Spring, Winter
- Active times: Morning, Afternoon
- Preferred water temperature: 50-68°F
- Typical depth: 3-12 feet in spring, 10-25 feet in summer
- Habitat: Lakes, Rivers, Ponds
- Spawning season: Spring

Recommended techniques:
- Fishing methods: Vertical jigging, Bobber fishing
- Effective lures: Small jigs, Spoons, Spinnerbaits
- Natural bait options: Minnows, Worms

Tackle recommendations:
- Rod: Ultralight to light power rod
- Reel: Spinning reel
- Line: 2-6 lb test

Question 18

What are the best fishing seasons at Grand Lake Saint Marys State Park?

Accepted Answer

Spring: Best for catching Bluegill, Channel catfish, Largemouth bass, Northern pike, Sauger, Saugeye, Yellow perch

Summer: Best for catching Bluegill, Channel catfish

Fall: Best for catching Largemouth bass, Northern pike, Sauger, Saugeye

Winter: Best for catching Yellow perch

Question 19

What water recreation activities are available at Grand Lake Saint Marys State Park?

Accepted Answer

Grand Lake Saint Marys State Park offers various recreational opportunities including:
      - Fishing

Additional lake information:
      - Lake size: 12896.00 acres (20.15 square miles)
      - Maximum depth: 0.00 meters

The lake is particularly suitable for swimming and water sports 
      during current conditions. Always check weather forecasts and local regulations before activities.

Question 20

What's the best time to visit Grand Lake Saint Marys State Park, and how's the weather?

Accepted Answer

The best time to visit Grand Lake Saint Marys State Park depends on your planned activities:
      - Summer (June-August): Ideal for swimming, boating, and water sports
      - Spring/Fall: Excellent fishing and fewer crowds
      - Winter: Ice fishing when conditions permit
      Current weather is Drizzle. 
      Check our current updates for water temperature and conditions before your visit.

Question 21

What permits and regulations should I know about for Grand Lake Saint Marys State Park?

Accepted Answer

For Grand Lake Saint Marys State Park, you should be aware of:
      - Fishing license requirements (check state regulations)
      - Boat registration requirements

For specific requirements and current regulations:
      
      - Contact local authorities
      - Visit the DNR website
      - Visit official websites listed below

Question 22

Where can I find more information about Grand Lake Saint Marys State Park?

Accepted Answer

You can find detailed information about Grand Lake Saint Marys State Park through these official resources:
        
        - State Parks Website
        
        These resources provide up-to-date information about:
        
        - Current lake conditions
        - Facility hours and availability
        - Special notices and alerts
        
        - Seasonal updates and events
        
        Official websites: https://www.stateparks.com/grand_lake_state_park_in_ohio.html

Question 23

What is the water temperature at Grand Lake Saint Marys State Park in January?

Accepted Answer

In January, the water temperature at Grand Lake Saint Marys State Park is approximately 34.90°F. 
        This information helps in planning activities like water activities.

Question 24

What is the water temperature at Grand Lake Saint Marys State Park in February?

Accepted Answer

In February, the water temperature at Grand Lake Saint Marys State Park is approximately 39.41°F. 
        This information helps in planning activities like water activities.

Question 25

What is the water temperature at Grand Lake Saint Marys State Park in March?

Accepted Answer

In March, the water temperature at Grand Lake Saint Marys State Park is approximately 40.33°F. 
        This information helps in planning activities like water activities.

Question 26

What is the water temperature at Grand Lake Saint Marys State Park in April?

Accepted Answer

In April, the water temperature at Grand Lake Saint Marys State Park is approximately 52.00°F. 
        This information helps in planning activities like water activities.

Question 27

What is the water temperature at Grand Lake Saint Marys State Park in May?

Accepted Answer

In May, the water temperature at Grand Lake Saint Marys State Park is approximately 58.14°F. 
        This information helps in planning activities like water activities.

Question 28

What is the water temperature at Grand Lake Saint Marys State Park in June?

Accepted Answer

In June, the water temperature at Grand Lake Saint Marys State Park is approximately 67.86°F. 
        This information helps in planning activities like water activities.

Question 29

What is the water temperature at Grand Lake Saint Marys State Park in July?

Accepted Answer

In July, the water temperature at Grand Lake Saint Marys State Park is approximately 79.57°F. 
        This information helps in planning activities like water activities.

Question 30

What is the water temperature at Grand Lake Saint Marys State Park in August?

Accepted Answer

In August, the water temperature at Grand Lake Saint Marys State Park is approximately 76.62°F. 
        This information helps in planning activities like water activities.

Question 31

What is the water temperature at Grand Lake Saint Marys State Park in September?

Accepted Answer

In September, the water temperature at Grand Lake Saint Marys State Park is approximately 74.24°F. 
        This information helps in planning activities like water activities.

Question 32

What is the water temperature at Grand Lake Saint Marys State Park in October?

Accepted Answer

In October, the water temperature at Grand Lake Saint Marys State Park is approximately 66.71°F. 
        This information helps in planning activities like water activities.

Question 33

What is the water temperature at Grand Lake Saint Marys State Park in November?

Accepted Answer

In November, the water temperature at Grand Lake Saint Marys State Park is approximately 43.79°F. 
        This information helps in planning activities like water activities.

Question 34

What is the water temperature at Grand Lake Saint Marys State Park in December?

Accepted Answer

In December, the water temperature at Grand Lake Saint Marys State Park is approximately 36.57°F. 
        This information helps in planning activities like water activities.

Question 35

What are the current fishing conditions at Grand Lake Saint Marys State Park?

Accepted Answer

Current water temperature at Grand Lake Saint Marys State Park is 71°F. 
        These conditions are ideal for catching Bluegill, Channel catfish, Largemouth bass.

Question 36

What is the maximum depth of Grand Lake Saint Marys State Park?

Accepted Answer

Grand Lake Saint Marys State Park has a maximum depth of 0.00 meters (0 feet). This depth provides excellent habitat for various fish species and supports diverse aquatic life. The lake's depth profile makes it suitable for both shallow-water fishing and deep-water activities.

Question 37

How big is Grand Lake Saint Marys State Park?

Accepted Answer

Grand Lake Saint Marys State Park covers an area of 12896.00 acres (20.15 square miles) at full pool. The lake is currently holding 4287.39 acres of water, which represents 33.2% of its total capacity. This substantial size makes it an important recreational resource for Mercer County, offering extensive opportunities for fishing, boating, and other water activities.

Question 38

Where is Grand Lake Saint Marys State Park located?

Accepted Answer

Grand Lake Saint Marys State Park is located in Celina, Mercer County, OH. The lake is accessible to the public and serves as a popular destination for outdoor activities. Its location in Mercer County makes it easily accessible from Celina and surrounding communities.

Question 39

What is the current water level at Grand Lake Saint Marys State Park?

Accepted Answer

Grand Lake Saint Marys State Park is currently holding 4287.39 acres of water, compared to its full capacity of 12896.00 acres. This represents 33.2% of its total capacity. Low water levels may impact some recreational activities. Check local conditions before visiting. These water levels are monitored regularly and impact various recreational activities on the lake.

Metric	Thu18	Fri19	Sat20	Sun21	Mon22	Tue23	Wed24	Thu25	Fri26
Condition	Rain	Mostly Clear	Mostly Clear	Heavy Rain	Heavy Rain	Partly Cloudy	Drizzle	Drizzle	Drizzle
High / Low	74°/61°	75°/56°	78°/57°	73°/60°	74°/62°	76°/56°	79°/58°	79°/61°	77°/62°
Precip	81%	0%	40%	74%	85%	26%	51%	46%	30%
Wind	21 mphgust 43	15 mphgust 22	14 mphgust 25	14 mphgust 28	16 mphgust 27	6 mphgust 14	8 mphgust 14	7 mphgust 14	7 mphgust 14
Pressure	29.64" stable	29.92" rising	29.95" rising	29.84" falling	29.87" rising	30.09" rising	30.01" falling	30.00" stable	30.02" rising
UV Index	6	8	8	5	7	6	7	6	7
Sunrise	10:06 AM	10:07 AM	10:07 AM	10:07 AM	10:07 AM	10:07 AM	10:08 AM	10:08 AM	10:08 AM
Sunset	1:11 AM	1:11 AM	1:11 AM	1:11 AM	1:12 AM	1:12 AM	1:12 AM	1:12 AM	1:12 AM
Bite Rating	2/5waxing crescent	2/5waxing crescent	3/5waxing crescent	3/5first quarter	2/5first quarter	2/5first quarter	3/5first quarter	2/5waxing gibbous	2/5waxing gibbous

Grand Lake Saint Marys State Park

Grand Lake Saint Marys State Park

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