Big Sandy Reservoir Water Level
USGS gauge 09213700 · near Farson, WY · U.S. Bureau of Reclamation (Upper Colorado HydroData)
Latest reading Oct 26, 10:15 AM · elevation
Big Sandy Reservoir is at 6,739.82 ft today, 4.8 ft lower than a year ago. It has risen 0.19 ft since yesterday and is up 1.23 ft over 7 days.
Water level chart
ft above sea levelReading
Big Sandy Reservoir fishing report & conditions
updated Oct 26, 12:50 PM ETLevel steady, light SW wind — good fall fishing day (7/10), best window 8:00 AM–9:00 AM (moonset near sunrise).
- Water temp—no water-temperature sensor on this water yet
- Air temphigh 49°F / low 28°FMostly Sunny
- WindLight SW1–8 mph 6 AM–6 PM, gusts to 12
- Level6,739.82 ftLevel steady (+0.19 ft in 24 h)
Official Wyoming fishing info: Wyoming Game and Fish — Fishing & boating info
Best fishing times today
Today is a good fishing day (solunar + local conditions)
7/10
Full moon · 99% lit · New moon Mon, Nov 9 · Sunrise 7:43 AM · Sunset 6:18 PM
Major fishing times
- Moon overhead12:01 AM–2:01 AM
- Moon underfoot12:29 PM–2:29 PM
Minor fishing times
- Moonset8:00 AM–9:00 AMSunrise
- Moonrise5:49 PM–6:49 PMSunset
Fishing times for the next 7 days
| TodayOct 26 | 7/10Good | Major 12:01 AM–2:01 AM · 12:29 PM–2:29 PM Minor 8:00 AM–9:00 AM · 5:49 PM–6:49 PM Light wind 1–8 mph |
|---|---|---|
| TueOct 27 | 5/10Fair | Major 12:58 AM–2:58 AM · 1:27 PM–3:27 PM Minor 9:19 AM–10:19 AM · 6:29 PM–7:29 PM Moderate wind 5–16 mph |
| WedOct 28 | 3/10Poor | Major 1:58 AM–3:58 AM · 2:30 PM–4:30 PM Minor 10:37 AM–11:37 AM · 7:20 PM–8:20 PM Light wind 5–9 mph |
| ThuOct 29 | 4/10Fair | Major 3:03 AM–5:03 AM · 3:35 PM–5:35 PM Minor 11:47 AM–12:47 PM · 8:24 PM–9:24 PM Calm wind 1–2 mph |
| FriOct 30 | 4/10Fair | Major 4:07 AM–6:07 AM · 4:39 PM–6:39 PM Minor 12:45 PM–1:45 PM · 9:36 PM–10:36 PM Light wind 4–5 mph |
| SatOct 31 | 4/10Fair | Major 5:09 AM–7:09 AM · 5:38 PM–7:38 PM Minor 1:31 PM–2:31 PM · 10:53 PM–11:53 PM Calm wind 2–5 mph |
| SunNov 1 | 5/10Fair | Major 5:06 AM–7:06 AM · 5:33 PM–7:33 PM Minor 1:06 PM–2:06 PM · 11:09 PM–12:09 AM Light wind 6–9 mph |
How this rating works
Solunar theory says fish feed more when the moon is overhead or underfoot (major periods, about 2 hours) and around moonrise and moonset (minor periods, about 1 hour). On a lake or river there is no tide, so instead of tide changes we score the local conditions anglers watch: the barometric pressure trend, the wind, whether the lake level is steady, and the water temperature where it is measured.
| Base | every day starts at 1 | 1 |
|---|---|---|
| Sunrise / sunset | a period overlaps sunrise or sunset ±1 h: major +2, minor +1 (max 3) (Moonset × sunrise +1; Moonrise × sunset +1) | 2 |
| Moon phase | within 2 days of a new or full moon +2, within 4 days +1 (today: 0.5 days) | 2 |
| Local conditions | pressure 6 AM→6 PM: falling +2, steady or slowly rising +1, rising fast 0 · daytime wind 4–15 mph +1, over 20 mph (or gusts over 30) −1 · level within ±0.25 ft in 24 h +1 · water 55–75°F +1, below 45°F or above 85°F −1 (0 to 4 in total)
| 2 |
| Today | 7, rounded | 7/10 |
1–3 poor · 4–5 fair · 6–7 good · 8–10 excellent. Pressure and wind are the NOAA National Weather Service hourly forecast for this spot; the level/flow trend is the latest 24 hours of readings on this page. Days 2–7 score sun, moon, forecast pressure and forecast wind only (level and water temperature aren’t forecast). Solunar times are a rule of thumb, not a guarantee.
Solunar periods calculated for 42.25, -109.43 (moon times from astronomical equations, Big Sandy Reservoir local time).
Weather & wind at Big Sandy Reservoir
air temperature, not water3-day forecast
- Today49° / 28°Mostly SunnyWind WSW 2 to 8 mphRain 13%
- Tuesday50° / 27°SunnyWind WSW 5 to 16 mphRain 44%
- Wednesday46° / 23°Mostly SunnyWind WSW 5 to 9 mphRain 2%
NOAA National Weather Service forecast for 42.249, -109.429 (grid RIW), issued Oct 26, 9:47 AM local time. High / low are air temperatures; water temperature is in the fishing section above. The “Air temp & weather” tile at the top refreshes live.
Past 12 months
daily readings from U.S. Bureau of Reclamation (Upper Colorado HydroData)- Today6,739.82 ft
- Same date last year6,744.61 ft−4.8 ft change
- 12-month high6,754.54 ftJun 1, 2026
- 12-month low6,732.50 ftSep 15, 2026
Last 10 days
| Date | Level (ft) | Change |
|---|---|---|
| Mon Oct 26 (today) | 6,739.78 | +0.03 |
| Sun Oct 25 | 6,739.75 | +0.19 |
| Sat Oct 24 | 6,739.56 | +0.14 |
| Fri Oct 23 | 6,739.42 | +0.16 |
| Thu Oct 22 | 6,739.26 | +0.17 |
| Wed Oct 21 | 6,739.09 | +0.17 |
| Tue Oct 20 | 6,738.92 | +0.20 |
| Mon Oct 19 | 6,738.72 | +0.22 |
| Sun Oct 18 | 6,738.50 | +0.26 |
| Sat Oct 17 | 6,738.24 | +0.30 |
Daily mean of all readings that day; today is the average so far.
Nearby lakes & rivers
About this data
- Gauge
- USGS 09213700 — Big Sandy Reservoir Near Farson, Wy
- Location
- 42.2491, -109.4293 · Wyoming
- Measures
- Lake/reservoir water-surface elevation above NGVD 1929
- Daily statistics
- Not available (approved daily values)
- Latest reading
- Oct 26, 10:15 AM local time (provisional)
- Page built
- Oct 26, 2026 12:50 PM ET
- Also from
- U.S. Bureau of Reclamation (Upper Colorado HydroData)
- Flood stages
- NWS gauge BIGW4 — National Water Prediction Service
Source: U.S. Geological Survey Water Data for the Nation (USGS monitoring location page). Readings every 15–60 minutes; the newest values are provisional. Percentiles compare today’s reading with every past year’s daily mean for the same calendar date. Weather: NOAA National Weather Service.