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Mercer, WI · Iron County
Right Now
Cloudy
Water
65°
Wind
3 mph
SSW
Gusts
7 mph
Pressure
30.10
falling
Forecast - Wed, Jun 24
High / Low
68° / 55°
Wind
4 mph
gusts 10 mph
Precip
91%
UV
4
Sunrise
10:09 AM
Sunset
1:55 AM
Every forecast metric for the week ahead — plus AI-picked best days for fishing, boating, swimming, and paddling.
Instant recommendations based on wind, precip, pressure, solunar, and temperature.
Best for Fishing
Fri, Fri, Jun 26
Fri, Jun 26 scores 62/100 — Wind 6 mph, Rain 0%.
Best for Boating
Fri, Fri, Jun 26
Fri, Jun 26 scores 90/100 — Wind 6 mph, Rain 0%.
Best for Swimming
Sat, Sat, Jun 27
Sat, Jun 27 scores 75/100 — Air 77°F, Wind 7 mph.
Best for Paddling
Fri, Fri, Jun 26
Fri, Jun 26 scores 85/100 — Wind 6 mph, Rain 0%.
Ask the AI assistant about this week:
Swipe to see all 9 days
| Metric | Wed24 | Thu25 | Fri26 | Sat27 | Sun28 | Mon29 | Tue30 | Wed1 | Thu2 |
|---|---|---|---|---|---|---|---|---|---|
| Condition | Rain | Drizzle | Mostly Cloudy | Partly Cloudy | Thunderstorms | Thunderstorms | Thunderstorms | Thunderstorms | Drizzle |
| High / Low | 68°/55° | 70°/53° | 74°/50° | 77°/53° | 78°/57° | 90°/66° | 90°/74° | 88°/67° | 86°/70° |
| Precip | 91% | 50% | 0% | 26% | 34% | 52% | 53% | 51% | 47% |
| Wind | 5 mphgust 10 | 7 mphgust 13 | 6 mphgust 12 | 7 mphgust 15 | 14 mphgust 28 | 11 mphgust 26 | 12 mphgust 23 | 8 mphgust 16 | 11 mphgust 24 |
| Pressure | 29.99" stable | 29.98" stable | 30.05" rising | 29.99" falling | 29.88" falling | 29.76" falling | 29.77" stable | 29.88" rising | 29.96" rising |
| UV Index | 4 | 5 | 4 | 6 | 5 | 7 | 7 | 8 | 9 |
| Sunrise | 10:09 AM | 10:09 AM | 10:10 AM | 10:10 AM | 10:11 AM | 10:11 AM | 10:12 AM | 10:12 AM | 10:13 AM |
| Sunset | 1:55 AM | 1:55 AM | 1:55 AM | 1:55 AM | 1:55 AM | 1:55 AM | 1:55 AM | 1:55 AM | 1:55 AM |
| Bite Rating | 3/5first quarter | 2/5waxing gibbous | 2/5waxing gibbous | 3/5waxing gibbous | 2/5waxing gibbous | 5/5FULL | 4/5FULL | 3/5FULL | 3/5waning gibbous |
Today Read
Martha LakeWind read
Calm
4 mph avg
Water read
65°
Warm-water bite
Air range
55° / 68°
today
Precip
91%
watch timing
Today's forecast for Martha Lake has calm wind, 55F to 68F air temperatures, 91% chance of precipitation, and 65F water.
AI read · today
Active temps make wind edges, shallow cover, and feeding windows more important. The planning constraint is finding the right window.
Reads 8 live data sources for this lake — tap a stat or ask anything to see its work.
Fishing Forecast
first quarter
Major
1:40 AM - 4:10 AM
Minor
8:54 PM - 10:24 PM
Detailed temperature readings across your lake.
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Water Temperature History
Current
66°
Jul 5
Low
32°
Feb 27
Average
54°
Last 12 Months
Warmest avg: August (73°F)
Coolest avg: March (37°F)
Rapid warming: April → May (+14°F)
Sharpest cooling: September → October (-16°F)
Wind speed, gusts, and pressure trends for trip timing.
Swipe days or tap points
5am - 4am
Peak Wind
11 mph
1pm
Peak Gust
24 mph
highest gust
Pressure
30.08 inHg
steady
Visibility
11 mi
38% clouds
Tap chart for details, swipe left or right for different days.Tap chart for details • Swipe for different days
Pressure stability helps plan windows
Tap chart points for pressure details
Nearby Lakes
Fishing Forecast
3/5first quarter
Water at 65°F -- warm-water species active.
Nearby Lakes
FAQ
Martha Lake covers 146.00 acres (0.23 square miles)
Martha Lake is located in Mercer, Iron County, WI. It is accessible to the public for outdoor activities.