Harsens Island, MI Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Harsens Island, MI.

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Current Conditions — Harsens Island, MI

PORT HURON (KPHN)

Clear

75.2 F
Humidity:41%
Wind Speed:SE 8.1 mph
Barometer:29.85 in
Dewpoint:50.0 F
Visibility:10.00 mi
Precip:--
Heat Index:74.3 F
Wind Chill:NA
Apr 23 2026, 06:15 PM EDT
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5-Day Forecast — Harsens Island, MI

Thursday

High 68 °F
Mostly Sunny
Thursday
Night
Low 50 °F
Partly Cloudy
Friday

High 66 °F
Chance of T-storms
Friday
Night
Low 48 °F
T-storms
Saturday

High 59 °F
Rain Showers
Saturday
Night
Low 42 °F
Mostly Cloudy
Sunday

High 62 °F
Mostly Cloudy
Sunday
Night
Low 46 °F
Partly Cloudy
Monday

High 66 °F
Chance of Rain Showers

Detailed Forecast — Harsens Island, MI

Thursday
Mostly Sunny. High near 68°F. Wind 8 to 9 mph, with gusts as high as 13 mph.
Thursday Night
Partly Cloudy. Low around 50°F. Wind 5 to 8 mph, with gusts as high as 12 mph.
Friday
Chance of Thunderstorms. High near 66°F. Wind 7 to 10 mph, with gusts as high as 18 mph.
Friday Night
Thunderstorms. Low around 48°F. Wind 6 to 10 mph, with gusts as high as 16 mph.
Saturday
Rain Showers. High near 59°F. Wind 7 to 10 mph, with gusts as high as 17 mph.
Saturday Night
Mostly Cloudy. Low around 42°F. Wind 6 to 10 mph, with gusts as high as 16 mph.
Sunday
Mostly Cloudy. High near 62°F. Wind 6 to 7 mph, with gusts as high as 12 mph.
Sunday Night
Partly Cloudy. Low around 46°F. Wind 5 to 6 mph, with gusts as high as 10 mph.
Monday
Chance of Rain Showers. High near 66°F. Wind 7 to 14 mph, with gusts as high as 22 mph.
Monday Night
Thunderstorms Likely. Low around 53°F. Wind 17 to 20 mph, with gusts as high as 29 mph.
Tuesday
Rain Showers Likely. High near 64°F. Wind around 16 mph, with gusts as high as 28 mph.
Tuesday Night
Slight Chance of Rain. Low around 48°F. Wind 8 to 14 mph, with gusts as high as 21 mph.
Wednesday
Slight Chance of Rain Showers. High near 62°F. Wind 7 to 10 mph, with gusts as high as 17 mph.
MI Radar
Current Radar • MI
Day 1 Outlook • April 23, 2026

Observation History — Harsens Island, MI

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
06:15 PM EDT SE 8.1 10.00 Clear -- 75.2 50.0 41% NA 74.3 29.85 1010.8
05:55 PM EDT SE 11.4 10.00 Clear -- 75.2 50.0 41% NA 74.3 29.86 1011.2
05:37 PM EDT 6.9 10.00 Clear -- 75.2 48.2 38% NA 74.3 29.87 1011.5
05:15 PM EDT 8.1 10.00 Clear -- 75.2 48.2 38% NA 74.3 29.87 1011.5
04:55 PM EDT S 5.8 10.00 Clear -- 75.2 50.0 41% NA 74.3 29.88 1011.9
04:36 PM EDT 10.3 10.00 Clear -- 75.2 48.2 38% NA 74.3 29.89 1012.2
04:15 PM EDT 8.1 10.00 Clear -- 75.2 46.4 36% NA 74.1 29.90 1012.5
03:55 PM EDT SE 10.3 10.00 Clear -- 75.2 46.4 36% NA 74.1 29.90 1012.5
03:35 PM EDT 8.1 10.00 Clear -- 75.2 44.6 34% NA 73.9 29.91 1012.9
03:15 PM EDT SE 9.2 10.00 Clear -- 75.2 44.6 34% NA 73.9 29.92 1013.2
02:55 PM EDT SE 8.1 G 16.1 10.00 Clear -- 73.4 42.8 33% NA 72.0 29.94 1013.6
02:36 PM EDT SE 8.1 10.00 Clear -- 73.4 44.6 36% NA 72.1 29.94 1013.9
02:15 PM EDT S 3.4 10.00 Clear -- 73.4 42.8 33% NA 72.0 29.95 1014.2
01:55 PM EDT SE 5.8 10.00 Partly Cloudy -- 71.6 41.0 33% NA 70.0 29.96 1014.6
01:35 PM EDT 9.2 10.00 Mostly Cloudy -- 71.6 42.8 35% NA 70.2 29.97 1014.9
01:15 PM EDT 8.1 10.00 Partly Cloudy -- 71.6 41.0 33% NA 70.0 29.98 1015.2
12:55 PM EDT 10.3 10.00 Clear -- 69.8 39.2 33% NA NA 29.97 1014.9
12:35 PM EDT SE 9.2 10.00 Clear -- 69.8 39.2 33% NA NA 29.98 1015.2
12:16 PM EDT 6.9 10.00 Clear -- 68.0 37.4 32% NA NA 29.99 1015.6
11:55 AM EDT SE 10.3 10.00 Clear -- 68.0 37.4 32% NA NA 29.99 1015.6
11:35 AM EDT SE 8.1 10.00 Clear -- 66.2 35.6 32% NA NA 29.99 1015.6
11:15 AM EDT SE 6.9 10.00 Clear -- 66.2 35.6 32% NA NA 30.00 1015.9
10:55 AM EDT SE 5.8 10.00 Clear -- 64.4 37.4 37% NA NA 30.00 1015.9
10:35 AM EDT SE 6.9 10.00 Clear -- 62.6 35.6 36% NA NA 30.01 1016.3

Regional Weather Observation

PORT HURON (KPHN)

Clear
75.2 F

SELFRIDGE ANGB (KMTC)

Mostly Clear
70.0 F

TROY/OAKLAND (KVLL)

Mostly Clear
75.2 F

DETROIT/CITY AIR (KDET)

Clear
73.4 F

PONTIAC (KPTK)

Mostly Cloudy
75.2 F

LAPEER (KD95)

Clear
77.0 F
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