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Safety guides Use current official weather information for Castine, Maine 04421 before making weather-sensitive plans.
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Open→Weather status
Dense Fog Advisory
Dense Fog Advisory issued August 23 at 9:10PM EDT until August 24 at 9:00AM EDT by NWS Caribou ME Expires Mon, 9:00 AM EDT.
Official NOAA / NWSWSR-88D DopplerUpdates every 5 minutes
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What’s next
Hourly forecast
Check the latest hourly conditions, seven-day outlook, rain timing, wind, sunrise and sunset for Castine, Maine 04421. Forecasts and alerts update from NOAA and the National Weather Service.
65°Widespread Fog14% rain65°Widespread Fog11% rain65°Widespread Fog8% rain65°Widespread Fog5% rain64°Widespread Fog8% rain
64°Widespread Fog26% rain65°Widespread Fog31% rain
64°Widespread Fog31% rainNext 24 hours
Rain Timeline
Scattered precipitation is possible. The highest official hourly chance is 31%; check the radar before heading out.
14%None
11%None
8%None
5%None
8%None
26%None
31%None
31%None
12%None
4%None
3%None
1%None
1%None
0%None
0%None
0%None
0%None
0%None
0%None
0%None
5%None
5%None
8%None
0%None
Official NWS outlook
7-Day Forecast
Today
! NWS65°64°
Widespread Fog
- Precipitation
- 31%
- Wind
- S 3 mph
- Sunrise
- 5:48 AM
- Sunset
- 7:29 PM
Mon
75°61°
Widespread Fog then Partly Sunny
- Precipitation
- 31%
- Wind
- S 3 to 13 mph
- Sunrise
- 5:49 AM
- Sunset
- 7:28 PM
Tue
77°59°
Areas Of Fog then Mostly Sunny
- Precipitation
- 5%
- Wind
- SW 2 to 12 mph
- Sunrise
- 5:51 AM
- Sunset
- 7:26 PM
Wed
79°59°
Sunny
- Precipitation
- 0%
- Wind
- W 1 to 8 mph
- Sunrise
- 5:52 AM
- Sunset
- 7:24 PM
Thu
82°62°
Mostly Sunny
- Precipitation
- 34%
- Wind
- W 0 to 10 mph
- Sunrise
- 5:53 AM
- Sunset
- 7:23 PM
Fri
79°61°
Chance Showers And Thunderstorms
- Precipitation
- 54%
- Wind
- S 7 to 10 mph
- Sunrise
- 5:54 AM
- Sunset
- 7:21 PM
Sat
82°56°
Mostly Sunny
- Precipitation
- 7%
- Wind
- W 2 to 8 mph
- Sunrise
- 5:55 AM
- Sunset
- 7:19 PM
Forecasts, icons, precipitation, wind, and alerts are from the National Weather Service. Sunrise and sunset are calculated locally for the selected coordinates.
Weather for a healthier day
Healthy Weather
Real Feel64°F
Use caution walking outside
Dense Fog Advisory is active. Review the official alert before going outside.
WindCalm0 mph
Best walk timeNo clearly better outdoor window today
The official hourly forecast shows similar weather impacts across the available hours. Shorten or move plans indoors if conditions are uncomfortable, and check active alerts before leaving.
Official EPA AirNowLocal air qualityCastine, Maine 04421View AQI +
More weather details
Wind gustsNot reported
Rain now14%next hour
Humidity100%current
UV indexCheckingEPA forecast
Wind impact: Light wind with little expected outdoor impact.
“Better weather window” is planning guidance based on official NWS data—not a promise of safe conditions. Review active alerts and radar before leaving.
Storm & DetailsGusts, pressure, visibility and official risk outlooksView details +
Wind gustNot reported
Pressure29.88 in
Visibility0.5 mi
Peak rain chance31%
Dew point64°F
Active alerts1
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Active NWS alerts
Moderate · Expected