Roche Harbor, San Juan Island, WA Weather Forecast and Current Conditions

Day	Sky	High / Low	Precip	Wind	Humidity
Sat Sep 12	Cloudy Close Hourly	-º / 55º	13%	SSW 7 mph	76%
6pm	Cloudy	64º	2%	SSW 3 mph	63%
7pm	Cloudy	62º	3%	SSW 5 mph	68%
8pm	Cloudy	61º	9%	SSW 6 mph	70%
9pm	Cloudy	60º	12%	SSW 7 mph	72%
10pm	Cloudy	59º	2%	SSW 7 mph	73%
11pm	Cloudy	59º	2%	SSW 7 mph	76%
Sun Sep 13	AM Clouds/PM Sun View Hourly	66º / 54º	7%	S 15 mph	72%
12am	Cloudy	58º	3%	S 7 mph	77%
1am	Cloudy	57º	6%	S 6 mph	81%
2am	Cloudy	57º	6%	S 6 mph	82%
3am	Cloudy	57º	6%	SSW 6 mph	84%
4am	Cloudy	56º	9%	SSW 5 mph	84%
5am	Cloudy	56º	7%	SW 4 mph	84%
6am	Cloudy	56º	6%	WSW 4 mph	85%
7am	Cloudy	56º	7%	WSW 3 mph	86%
8am	Cloudy	57º	6%	WSW 2 mph	84%
9am	Cloudy	59º	6%	SW 3 mph	81%
10am	Mostly Cloudy	61º	5%	SSW 3 mph	75%
11am	Mostly Cloudy	62º	4%	S 4 mph	71%
12pm	Mostly Cloudy	63º	3%	SSE 5 mph	68%
1pm	Mostly Cloudy	64º	4%	SSE 7 mph	67%
2pm	Partly Cloudy	65º	3%	SSE 10 mph	65%
3pm	Mostly Sunny	65º	3%	SSE 12 mph	65%
4pm	Partly Cloudy	65º	3%	SSE 15 mph	65%
5pm	Mostly Sunny	64º	3%	SSE 15 mph	67%
6pm	Mostly Sunny	62º	4%	S 15 mph	71%
7pm	Mostly Sunny	60º	5%	S 13 mph	75%
8pm	Partly Cloudy	59º	5%	S 11 mph	77%
9pm	Partly Cloudy	58º	5%	SSW 10 mph	79%
10pm	Mostly Clear	57º	6%	SSW 9 mph	80%
11pm	Mostly Clear	57º	7%	SSW 9 mph	82%
Mon Sep 14	Mostly Cloudy View Hourly	64º / 53º	7%	SSE 7 mph	74%
12am	Mostly Clear	56º	7%	SSW 8 mph	83%
1am	Mostly Clear	56º	7%	SSW 8 mph	83%
2am	Mostly Clear	56º	7%	SSW 8 mph	85%
3am	Partly Cloudy	56º	7%	SSW 7 mph	86%
4am	Partly Cloudy	55º	7%	SSW 7 mph	86%
5am	Partly Cloudy	55º	9%	SSW 6 mph	87%
6am	Mostly Cloudy	55º	7%	S 6 mph	87%
7am	Cloudy	55º	7%	S 6 mph	89%
8am	Cloudy	56º	7%	S 6 mph	85%
9am	Cloudy	58º	7%	SSE 6 mph	83%
10am	Mostly Cloudy	59º	6%	SSE 7 mph	80%
11am	Cloudy	60º	6%	SSE 7 mph	77%
12pm	Mostly Cloudy	62º	5%	SSE 7 mph	70%
1pm	Mostly Cloudy	63º	5%	SSE 7 mph	68%
2pm	Mostly Cloudy	63º	4%	SSE 7 mph	66%
3pm	Mostly Cloudy	63º	4%	SSE 6 mph	65%
4pm	Mostly Cloudy	63º	4%	SSE 6 mph	66%
5pm	Mostly Cloudy	63º	4%	SSE 6 mph	67%
Tue Sep 15	Partly Cloudy	66º / 53º	24%	N 6 mph	73%
Wed Sep 16	Mostly Sunny	66º / 54º	19%	N 5 mph	74%
Thu Sep 17	Partly Cloudy	67º / 54º	19%	N 8 mph	73%
Fri Sep 18	Mostly Sunny	67º / 54º	18%	NNE 5 mph	73%
Sat Sep 19	Partly Cloudy	67º / 53º	7%	SE 5 mph	73%

Buoy Data
For Roche Harbor, San Juan Island, WA
Wind Forecast
In Roche Harbor, San Juan Island, WA
Radar
In Roche Harbor, San Juan Island, WA
Marine Forecast
In Roche Harbor, San Juan Island, WA

NOAA Weather Marine Forecast for Roche Harbor, San Juan Island, WA

Tonight

Low : 54ºF
SW wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Increasing clouds. Waves 1 ft or less.

Sunday

High : 67ºF
Variable winds less than 5 kt becoming S 9 to 14 kt in the afternoon. Mostly cloudy through mid morning, then gradual clearing. Waves 1 ft or less.

Sunday Night

Low : 53ºF
SSW wind 7 to 14 kt, with gusts as high as 21 kt. Increasing clouds. Waves 1 ft or less.

Monday

High : 65ºF
S wind 6 to 8 kt. Partly sunny. Waves 1 ft or less.

Monday Night

Low : 53ºF
S wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Mostly cloudy. Waves 1 ft or less.

Tuesday

High : 65ºF
Variable winds less than 5 kt becoming N around 6 kt in the afternoon. Mostly sunny. Waves 1 ft or less.

Tuesday Night

Low : 53ºF
Variable winds 5 kt or less. Clear. Waves 1 ft or less.

Wednesday

High : 66ºF
Variable winds less than 5 kt becoming N around 6 kt in the afternoon. Sunny. Waves 1 ft or less.

Wednesday Night

Low : 53ºF
Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.

Current Weather Conditions In Roche Harbor, San Juan Island, WA

As Of: 14 minutes ago

Temperature: 64ºF
Feels Like: 64ºF

Wind Speed: 3mph
Direction: 0º (SSW)
Gusts: 3mph

Cloud Cover: Cloudy
Visibility: 10mi

Pressure: 29.81"
Humidity: 63%
Dew Point: 0ºF

The weather right now in Roche Harbor, San Juan Island, WA is Cloudy. The current temperature is 64°F, and the expected high and low for today, Saturday, September 12, 2026, are -° high temperature and 55°F low temperature. The wind is currently blowing at 3 miles per hour, and coming from the South Southwest. The wind is gusting to 3 mph. With the wind and the atmosphere the temperature feels like 64° Fahrenheit. Expected precipitation is 2 percent, with current humidity at 63 percent, and air pressure at 29.81 in. Visibility is 10 nautical miles. There are no current weather alert(s).