Island County, WA Weather Forecast
County weather hub
Chance Light Rain then Mostly Sunny
Compare major city weather across Island County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of rain before 8am. Mostly sunny. High near 60, with temperatures falling to around 58 in the afternoon. West northwest wind 12 to 18 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
County Weather Overview
This county weather page brings together forecast coverage for Island County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 2 of 2 mapped cities in Island County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 17 to Oct 23, 2026
- Latest sync
- Oct 17, 2026 9:58 AM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in Island County
Today looks like the warmest upcoming period in Island County at 60 degrees F.
Friday Night is the coolest period ahead with temperatures near 44 degrees F.
The strongest winds are forecast for Today at about 12 to 18 mph WNW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 17, 2026 9:58 AM PDT
- Coverage
- 8 days
- Time zone
- America/Los_Angeles
- Forecast office
- SEW
- Radar station
- KATX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 46. West northwest wind 3 to 14 mph.
Mostly cloudy, with a high near 55. Northwest wind 3 to 8 mph.
Mostly cloudy, with a low around 46. Northwest wind 2 to 8 mph.
Mostly cloudy, with a high near 56. West wind around 5 mph.
Partly cloudy, with a low around 45.
Mostly sunny, with a high near 56.
Mostly clear, with a low around 46.
Mostly sunny, with a high near 55.
A chance of rain after 5am. Mostly cloudy, with a low around 46.
A chance of rain. Mostly cloudy, with a high near 54.
A chance of rain. Mostly cloudy, with a low around 46.
A slight chance of rain. Mostly sunny, with a high near 53.
A slight chance of rain. Mostly cloudy, with a low around 44.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Oct 17
|
Chance Light Rain then Mostly Sunny
|
60°F |
12 to 18 mph
WNW
|
|
Tonight
Oct 17
|
Mostly Clear
|
46°F |
3 to 14 mph
WNW
|
|
Sunday
Oct 18
|
Mostly Cloudy
|
55°F |
3 to 8 mph
NW
|
|
Sunday Night
Oct 18
|
Mostly Cloudy
|
46°F |
2 to 8 mph
NW
|
|
Monday
Oct 19
|
Mostly Cloudy
|
56°F |
5 mph
W
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
45°F |
5 mph
NW
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
56°F |
5 to 10 mph
NW
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
46°F |
1 to 8 mph
NW
|
|
Wednesday
Oct 21
|
Mostly Sunny
|
55°F |
1 to 5 mph
NW
|
|
Wednesday Night
Oct 21
|
Mostly Cloudy then Chance Light Rain
|
46°F |
1 to 5 mph
W
|
|
Thursday
Oct 22
|
Chance Light Rain
|
54°F |
3 to 7 mph
SW
|
|
Thursday Night
Oct 22
|
Chance Light Rain
|
46°F |
6 to 9 mph
W
|
|
Friday
Oct 23
|
Slight Chance Light Rain
|
53°F |
7 mph
W
|
|
Friday Night
Oct 23
|
Slight Chance Light Rain
|
44°F |
5 mph
W
|
Major City Forecasts
Live forecast snapshots for major cities across Island County.
Coverage
Forecast coverage currently spans 2 of 2 mapped cities in Island County.
Largest mapped city population in this region: 23,643.
