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Speelyai Bay Park — Boating Conditions
Tides, water temp & weather • Cowlitz County, WA
Boating Conditions at Speelyai Bay Park
Current wind, air and water temperature, tide times and a 10-day forecast for Speelyai Bay Park on Merwin Reservoir in Cowlitz County, Washington. Check conditions before you launch.
Right Now
Clear
Calm — good conditions to get on the water
Air Temp
73°F
Wind
6 mph
gusts 9 mph
Tide Times
Nearest tide station: St Helens, OR · ~20 mi away
SunLow 8:57 AM (0.3 ft)High 2:30 PM (1.5 ft)Low 6:50 PM (0.8 ft)
MonHigh 12:32 AM (2 ft)Low 9:41 AM (0.1 ft)High 3:16 PM (1.7 ft)Low 8:24 PM (0.7 ft)
Next Few Hours
Now
☀️
69°
6 mph
8PM
☀️
66°
4 mph
9PM
☀️
64°
2 mph
10PM
☀️
64°
1 mph
11PM
☀️
63°
3 mph
12AM
☀️
61°
3 mph
10-Day Boating Forecast
Sat, 9/19
⛅
76° / 52°
Wind 7 mph
Sun, 9/20
☀️
84° / 57°
Wind 8, gusts 13 mph
Mon, 9/21
⛅
77° / 55°
Wind 7, gusts 11 mph
Tue, 9/22
⛅
72° / 50°
Wind 8, gusts 11 mph
Wed, 9/23
⛅
70° / 47°
Wind 6, gusts 10 mph
1% rain
Thu, 9/24
🌧️
69° / 47°
Wind 5 mph
7% rain
Fri, 9/25
🌧️
55° / 46°
Wind 4, gusts 12 mph
19% rain
Sat, 9/26
⛅
69° / 45°
Wind 5 mph
8% rain
Sun, 9/27
🌧️
54° / 48°
Wind 4, gusts 11 mph
9% rain
Mon, 9/28
🌧️
64° / 48°
Wind 5 mph
10% rain
Weather & wave data from Open-Meteo. Tides & water temperature from NOAA CO-OPS. Conditions are estimates for trip planning — always confirm locally and check official marine forecasts before heading out.
