Water level
2892.95ft
-0.03 ft in 24h
USGS 12371550 updated 3:30 AM
MT · Thu, Aug 6
How's the bite at Flathead Lake today? Good — fish it after dark.
Solid window. Be on the water early.
Built from solunar, pressure, level, wind. This water has no live gauge for every reading — see the sources below.
7/10
Good
Today's bite windows
12 AM6 AMNoon6 PM11 PM
Major
6:41 AM–8:41 AM
Moon overhead
Minor
3:27 PM–4:27 PM
Moonset
Major
7:10 PM–9:10 PM
Moon underfoot
Sunrise 6:20 AM · sunset 9:03 PM · tomorrow's first major 7:40 AM–9:40 AM · windows on every water
Solunar · computed updated 4:26 AM
Conditions right now
Pressure
29.98inHg
steady · +0.34 hPa/12h
NOAA KGPI updated 4:15 AM
Wind
0mph N
NOAA KGPI updated 4:15 AM
Moon
43% waning
Solunar · computed updated 4:26 AM
What this means
Largemouth bass, Crappie, Catfish
This gauge reports level but no water temperature, so depth calls stay open. Read the windows and the pressure trend instead.
Flathead Lake water level today
2892.95 ft down 0.03 ft in 24 hours
That sits 42% of the way up the band it has held over the last 8 days, between 2892.87 and 2893.06 ft. Over the week it is down0.07ft.
07-29 2892.87–2893.06 ft 08-06
USGS 12371550 updated 3:30 AM
The week ahead
| Fri | 6 | Decent | |
|---|---|---|---|
| Sat | 6 | Decent | |
| Sun | 6 | Decent | |
| Mon | 6 | Decent | |
| Tue | 6 | Decent | |
| Wed | 6 | Decent | |
| Thu | 6 | Decent |
Forecast days carry solunar and the wind outlook. Pressure and gauge movement land the morning of.
Before you go
A MT fishing license covers this water. The state agency sets the rules and is the one that counts.
Nearby waters today
- 8 Good Bitterroot River MT · 192 km
- 6 Decent Madison River MT · 330 km
- 7 Good Gallatin River MT · 349 km
- 6 Decent Lake Hartwell GA · 2976 km
- 4 Fair Key West FL · 3832 km
Questions people ask about Flathead Lake
Answered from the same readings as the rest of this page. Where we have no basis for an answer, there is no entry — spot-by-spot local knowledge is not something we can claim for Flathead Lake.
- Is it worth fishing Flathead Lake today?
- 7 out of 10 — good. Solid window. Be on the water early. The strongest stretch is 6:41 AM–8:41 AM. That number is worked out fresh each morning from the solunar windows, the pressure trend, the water level.
- What time should you fish Flathead Lake?
- Today's major windows run 6:41 AM–8:41 AM and 7:10 PM–9:10 PM, with minor windows at 3:27 PM–4:27 PM. Sunrise is 6:20 AM and sunset 9:03 PM. A major landing on first or last light is the stretch worth setting an alarm for.
- What is the water temperature at Flathead Lake?
- No gauge on Flathead Lake measures water temperature. US reservoir gauges report height, not temperature — so rather than estimate it, this page leaves it out and leans on the windows and the pressure trend instead.
- What is the water level at Flathead Lake right now?
- 2892.95 ft, read at 3:30 AM from USGS station 12371550. Over 24 hours it is down 0.03 ft.
- Can you eat the fish you catch in Flathead Lake?
- That is a health question, and it is answered officially rather than by us. Montana Fish, Wildlife & Parks, with the health and environmental departments publishes the fish consumption advisory covering these waters, where issued as one statewide document rather than a searchable database, with 21 new or revised PFAS advisories in 2026. Read it before you keep a meal — we give no eating advice.
Where these numbers come from
- Solunar computed 4:26 AM
- NOAA KGPI Kalispell, Glacier Park International Airport 4:15 AM
- NOAA MSO gridded forecast 2:00 AM
- USGS 12371550 Flathead Lake at Polson MT 3:30 AM
Polson liegt am Südende. Der grösste natürliche Süsswassersee westlich des Mississippi hat genau diese eine Station.
No one types these in by hand. If a source goes quiet, the page says so instead of showing you yesterday.