Grand Coulee & Lake Roosevelt
Grand Coulee Dam from Crown Point - © Steven Pavlov / https://commons.wikimedia.org/wiki/User:Senapa
Today’s Forecast:
🌤
94°F
Current Temperature
⚠️
Air Quality Alert
Air Quality Alert issued July 24 at 4:19PM PDT by NWS Spokane WA (Expires: July 26, 2026 3:00 pm)
Show Alert Details & Instructions
Description:
An Air Quality Alert has been issued by the following agencies:
Washington Department of Ecology
Colville Confederated Tribes
Environmental Protection Agency
An Air Quality Alert has been issued for all of Asotin, Chelan,
Douglas, Ferry, Garfield, Grant, Lincoln, Okanogan, Pend Oreille, and
Stevens Counties through Monday at 11 am, due to current and expected
wildfire smoke from regional fires. Areas to the north and northeast
of active and emerging fires in Washington and Oregon could reach
Unhealthy levels of particulate matter (PM2.5). When air quality is
unhealthy, everyone should reduce exposure. Limit time outside, avoid
strenuous outdoor activity, and follow tips for cleaner indoor air.
⚠️
Air Quality Alert
Air Quality Alert issued July 24 at 4:06PM PDT by NWS Spokane WA (Expires: July 27, 2026 1:00 pm)
Show Alert Details & Instructions
Description:
An Air Quality Alert has been issued by the following agencies:
Washington Department of Ecology
Colville Confederated Tribes
Environmental Protection Agency
An Air Quality Alert has been issued for all of Asotin, Chelan,
Douglas, Ferry, Garfield, Grant, Lincoln, Okanogan, Pend Oreille, and
Stevens Counties through Monday at 11 am, due to current and expected
wildfire smoke from regional fires. Areas to the north and northeast
of active and emerging fires in Washington and Oregon could reach
Unhealthy levels of particulate matter (PM2.5). When air quality is
unhealthy, everyone should reduce exposure. Limit time outside, avoid
strenuous outdoor activity, and follow tips for cleaner indoor air.
⚠️
Air Quality Alert
Air Quality Alert issued July 24 at 3:16PM PDT by NWS Spokane WA (Expires: July 27, 2026 1:00 pm)
Show Alert Details & Instructions
Description:
An Air Quality Alert has been issued by the following agencies:
Washington Department of Ecology
Colville Confederated Tribes
Environmental Protection Agency
An Air Quality Alert has been issued for all of Asotin, Chelan,
Douglas, Ferry, Garfield, Grant, Lincoln, Okanogan, Pend Oreille, and
Stevens Counties through Monday at 11 am, due to current and expected
wildfire smoke from regional fires. Areas to the north and northeast
of active and emerging fires in Washington and Oregon could reach
Unhealthy levels of particulate matter (PM2.5). When air quality is
unhealthy, everyone should reduce exposure. Limit time outside, avoid
strenuous outdoor activity, and follow tips for cleaner indoor air.
⚠️
Air Quality Alert
Air Quality Alert issued July 24 at 10:53AM PDT by NWS Spokane WA (Expires: July 27, 2026 1:00 pm)
Show Alert Details & Instructions
Description:
An Air Quality Alert has been issued by the following agencies:
Washington Department of Ecology
Colville Confederated Tribes
An Air Quality Alert has been issued for all of Asotin, Chelan,
Douglas, Ferry, Garfield, Grant, Lincoln, Okanogan, Pend Oreille, and
Stevens Counties through Monday at 11 am, due to current and expected
wildfire smoke from regional fires. Areas to the north and northeast
of active and emerging fires in Washington and Oregon could reach
Unhealthy levels of particulate matter (PM2.5). When air quality is
unhealthy, everyone should reduce exposure. Limit time outside, avoid
strenuous outdoor activity, and follow tips for cleaner indoor air.
⚠️
Red Flag Warning
Red Flag Warning issued July 24 at 8:27AM PDT until July 25 at 10:00PM PDT by NWS Spokane WA (Expires: July 26, 2026 12:00 am)
Show Alert Details & Instructions
Description:
...RED FLAG WARNING FOR WIND AND LOW HUMIDITY FRIDAY FOR PORTIONS
OF CENTRAL WASHINGTON...
...RED FLAG WARNING FOR STRONG WINDS AND LOW HUMIDITY SATURDAY
FOR MUCH OF THE INLAND NORTHWEST...
* Affected Area: Colville Reservation (Zone 702), Okanogan
Valley (Zone 703), Foothills of Central Washington Cascades
(Zone 705) and Waterville Plateau (Zone 706).
* Winds: Friday winds - Southwest winds 10 to 20 mph with gusts
around 25 to 30 mph. Saturday winds - West/Southwest winds 15 to
30 mph with gusts around 30 to 45 mph.
* Relative Humidities: 11 to 23 percent.
* Impacts: Gusty winds and low humidity Friday and Saturday may
lead to rapid fire spread with any new or ongoing fires.
Instructions:
A Red Flag Warning means that critical fire weather conditions
are either occurring now....or will shortly. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.
⚠️
Red Flag Warning
Red Flag Warning issued July 24 at 8:27AM PDT until July 24 at 11:00PM PDT by NWS Spokane WA (Expires: July 25, 2026 1:00 am)
Show Alert Details & Instructions
Description:
...RED FLAG WARNING FOR WIND AND LOW HUMIDITY FRIDAY FOR PORTIONS
OF CENTRAL WASHINGTON...
...RED FLAG WARNING FOR STRONG WINDS AND LOW HUMIDITY SATURDAY
FOR MUCH OF THE INLAND NORTHWEST...
* Affected Area: Colville Reservation (Zone 702), Okanogan
Valley (Zone 703), Foothills of Central Washington Cascades
(Zone 705) and Waterville Plateau (Zone 706).
* Winds: Friday winds - Southwest winds 10 to 20 mph with gusts
around 25 to 30 mph. Saturday winds - West/Southwest winds 15 to
30 mph with gusts around 30 to 45 mph.
* Relative Humidities: 11 to 23 percent.
* Impacts: Gusty winds and low humidity Friday and Saturday may
lead to rapid fire spread with any new or ongoing fires.
Instructions:
A Red Flag Warning means that critical fire weather conditions
are either occurring now....or will shortly. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.
Tonight:Areas of smoke between 9pm and 4am, then haze between 4am and 5am. Mostly clear, with a low around 67. Southwest wind 3 to 13 mph, with gusts as high as 25 mph.
Saturday:Sunny. High near 94, with temperatures falling to around 92 in the afternoon. Southwest wind 3 to 22 mph, with gusts as high as 41 mph.
Saturday Night:Mostly clear, with a low around 61. Southwest wind 6 to 22 mph, with gusts as high as 41 mph.
Today’s Report:
Boating
Not Recommended
11
/100
Not Recommended for boating. High near 93°F. Windy conditions (22 mph). Smoke or haze in forecast.
- Temp: Marginal weather factor
- Rain: Favorable conditions
- Wind: Unfavorable weather factor
- Smoke: Marginal weather factor
- Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Use Caution
46/100
Camping
Use Caution
41
/100
Use Caution for camping. High near 93°F. Breezy winds (22 mph). Smoke or haze in forecast.
- Temp: Marginal weather factor
- Rain: Favorable conditions
- Wind: Marginal weather factor
- Smoke: Marginal weather factor
- Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Good
81/100
Outdoor Events / Activities
Not Recommended
12
/100
Not Recommended for outdoor events / activities. High near 93°F. Breezy winds (22 mph). Smoke or haze in forecast. Temperatures outside comfort limits (93°F).
- Temp: Unfavorable weather factor
- Rain: Favorable conditions
- Wind: Marginal weather factor
- Smoke: Marginal weather factor
- Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Good
76/100
About Grand Coulee & Lake Roosevelt
Grand Coulee & Lake Roosevelt is a Washington destination for the major dam, long reservoir, launches, campgrounds, scenic drives, and seasonal visitor events.
Make the Most of a Grand Coulee & Lake Roosevelt Day
Distances are large and reservoir wind can rise quickly. Check water level, ramps, heat, smoke, fire restrictions, and event schedules.
Weather Tips for Grand Coulee & Lake Roosevelt
- Check heat, wind, wildfire smoke, and fire restrictions as closely as rain because exposed eastern routes offer limited shade.
- Cold water, waves, current, wind, and lightning should guide water plans more than sunshine alone.
- Check overnight lows, wet ground, fire rules, drainage, and the nearest substantial shelter before settling into camp.
- Summer smoke, winter access, shoulder-season closures, and shorter fall daylight can matter even during an otherwise mild forecast.
Nearby Towns and Areas
This page can also be useful when planning outdoor time near:
- Grand Coulee Dam
- Coulee Dam
- Fort Spokane
- Spring Canyon
- Kettle Falls
- Banks Lake
- Columbia River
Plan Around the Conditions
Use the forecast to choose the best version of a Grand Coulee & Lake Roosevelt day. Match wind, precipitation, smoke, water conditions, trail surfaces, road access, temperature, and daylight to the activity that gives your group the safest and most comfortable plan.
7-Day Forecast for Grand Coulee & Lake Roosevelt
Grand Coulee & Lake Roosevelt Weather by Season
Winter
Winter at Grand Coulee & Lake Roosevelt brings cold air, periodic snow, ice, and strong wind. Roads and exposed trails can stay slick even during otherwise dry stretches.
Spring
Spring around Grand Coulee & Lake Roosevelt brings changing conditions, rising rivers, wet trails, and lingering mountain snow. Cold water from rain and snowmelt remains a major planning factor. Mountain and eastern thunderstorms become increasingly possible later in the season.
Summer
Summer at Grand Coulee & Lake Roosevelt is usually the driest and most dependable season, but wildfire smoke, fire restrictions, heat, and afternoon thunderstorms can interrupt plans. Use calmer mornings for boating or paddling and keep a shore-based backup. Dry vegetation makes local fire rules especially important.
Fall
Fall at Grand Coulee & Lake Roosevelt brings cooler temperatures, shorter daylight, changing color, and the return of wetter weather west of the Cascades. Water cools faster than the air, increasing cold-water consequences. Check seasonal facility hours and allow extra time on busy event or salmon-viewing weekends.
Key Climate Data Points
- Annual average temperature: around 50–53°F, using the relevant local or regional elevation context.
- Annual snowfall: generally around 10–25 inches depending on location, with substantial year-to-year and elevation variation.
- Warmest months: July and August are normally warmest.
- Coolest months: December and January are typically coolest.
- Wettest season: late fall and winter.
- Driest season: July and August.
- Best outdoor window: May through September for boating and camping, with mornings favored in summer.