Triadelphia Reservoir

Triadelphia Reservoir

Brookville, Montgomery County, MD
1mi²
ft
Directions
Lake Information

Triadelphia Reservoir is located on the Patuxent River, in Howard County and Montgomery County, Maryland.

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Current Conditions

71°F°
Feels like 73°F°
Cloudy
Today's High
78°F°
Today's Low
54°F°

Water Temperature

63°F
Updated: (May 11)
Sign in to contribute temps.

Current water temperature for Triadelphia Reservoir is 63°F.

Current Snapshot

Wind0 mph SW (Gust 2 mph)
Pressure
30.22 inHg
Visibility26 mi
Humidity56%
Cloud Cover100%

Forecast: Monday, May 12

Day 1 of 9

Hourly Insights

7 AM
55°F°
10 AM
71°F°
1 PM
77°F°
4 PM
76°F°
7 PM
73°F°
75%

Temperature

High
78°F°
Low
54°F°

Precipitation

Chance75%
Amount0.04"
Typerain

Wind

3mph
Avg Speed
Gusts up to
18mph
CalmModerateStrong
Max Speed7 mph

Sun, Moon & UV

Sunrise9:57 AM
Sunset12:12 AM
Moon PhasewaxingGibbous
Max UV Index7 (High)

Solunar Fishing Forecast

Action Rating
4/5

Todays action is rated a 4 (scale is 0 thru 5, 5 is the best)

Major Times (Best)

4:06 AM - 6:36 AM

6:16 PM - 8:46 PM

Minor Times (Good)

12:08 AM - 1:38 AM

9:01 AM - 10:31 AM

Outlook for Monday at Triadelphia Reservoir

Expect temperatures ranging from 54°F to 78°F. There's a 75% chance of rain, potentially bringing around 0.04" rain. Winds will be averaging 3 mph, with potential gusts reaching up to 18 mph. The maximum UV index will be 7 (High), so plan sun protection accordingly. For anglers, today's fishing action is rated 4/5 (Todays action is rated a 4 (scale is 0 thru 5, 5 is the best)). Look for the best bite times during the major periods around 4:06 AM and 6:16 PM, or try the minor windows near 12:08 AM and 9:01 AM for potential early morning or evening action. Check back for the latest conditions and forecasts for Triadelphia Reservoir.

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May 12th 2025

Lake Information

Elevation
N/A
Area
1 mi²
Coordinates
39.199, -77.012

Weather Forecast

Monday

78°F
54°F

Tuesday

66°F
62°F

Wednesday

72°F
61°F

Thursday

78°F
62°F

Friday

79°F
64°F

Saturday

81°F
63°F

Sunday

80°F
62°F

Monday

70°F
59°F

Tuesday

71°F
55°F
Monday - 5/12/2025
78°F
54°F
12am
60°F
63°F
30.24 hPa
0 mph
W
G: 0 mph
2am
57°F
63°F
30.24 hPa
1 mph
ENE
G: 1 mph
4am
55°F
63°F
30.25 hPa
1 mph
E
G: 2 mph
6am
54°F
63°F
30.25 hPa
0 mph
ESE
G: 1 mph
8am
59°F
63°F
30.28 hPa
1 mph
E
G: 3 mph
10am
71°F
63°F
30.27 hPa
1 mph
SE
G: 5 mph
12pm
76°F
63°F
30.24 hPa
4 mph
SSE
G: 9 mph
2pm
77°F
63°F
30.21 hPa
3 mph
SSE
G: 9 mph
4pm
76°F
63°F
30.16 hPa
3 mph
S
G: 8 mph
6pm
73°F
63°F
30.14 hPa
5 mph
SSE
G: 12 mph
8pm
71°F
63°F
30.13 hPa
7 mph
SSE
G: 14 mph
10pm
67°F
63°F
30.14 hPa
6 mph
SE
G: 14 mph

Water Temperature History

Trends for Triadelphia Reservoir

Current Temp

Sign in to view

Latest recorded surface temperature.

Lowest in Period

33°F

On Jan 5

Coldest point in the Last 12 Months.

Average in Period

59°F

Typical temp during the Last 12 Months.

Temperature Trend: Last 12 Months

Surface temperature over the selected period.

Key Observations (Last 12 Months)

  • Warmest avg: July (86°F).
  • Coolest avg: December (39°F).
  • Avg temps often suitable for swimming during July.
  • Rapid warming often occurs: June → July (+16°F).
  • Sharpest cooling trend: November → December (-16°F).

Weather Forecast

Wind speed and pressure trends

Hourly Wind Forecast

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm05101520

Wind Direction

277°

Pressure

1024 mb

Cloud Cover

57%

Visibility

20 miles

Daily Pressure Forecast

MonTueWedThuFriSatSunMonTue0.008.8617.7226.5835.44
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Frequently Asked Questions About Triadelphia Reservoir

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