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 Port Jefferson Weather Forecast Summary |
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Today
Feb 28th
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Sunday
Mar 1st
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Monday
Mar 2nd
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Tuesday
Mar 3rd
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Wednesday
Mar 4th
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Mostly Sunny |
Cloudy |
Cloudy |
Mix of rain and snow |
Mix of rain and snow |
39°F
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39°F
19°F |
24°F
15°F |
34°F
25°F |
38°F
32°F |
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| Port Jefferson Detailed Weather Forecast |
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| Saturday, February 28th, 2026 |
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Overnight |
Temperature: 32°F |
| Clear. Windy at times. |
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Morning |
Temperature: 37°F |
| Sunny with cloudy periods. Windy at times. |
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Afternoon |
Temperature: 38°F |
| Sunny. |
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Evening |
Temperature: 36°F |
| Clear. |
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| Sunday, March 1st, 2026 |
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Overnight |
Temperature: 36°F |
| Mostly clear. |
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Morning |
Temperature: 37°F |
| Cloudy. Windy at times. |
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Afternoon |
Temperature: 34°F |
| A mix of cloud and sun. Windy. |
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Evening |
Temperature: 21°F |
| Clear with cloudy periods. Wind 20 to 30 mph. |
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| Monday, March 2nd, 2026 |
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Overnight |
Temperature: 15°F |
| Cloudy. Windy. |
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Morning |
Temperature: 19°F |
| Sunny. Windy at times. |
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Afternoon |
Temperature: 24°F |
| Sunny. |
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Evening |
Temperature: 24°F |
| Cloudy. |
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| Tuesday, March 3rd, 2026 |
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Overnight |
Temperature: 27°F |
| Cloudy. |
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Morning |
Temperature: 30°F |
| Cloudy with flurries or showers likely. |
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Afternoon |
Temperature: 34°F |
| Cloudy with a few flurries or showers. Risk of freezing rain. |
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Evening |
Temperature: 33°F |
| Cloudy with a slight chance of flurries or showers. |
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| Wednesday, March 4th, 2026 |
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Overnight |
Temperature: 33°F |
| Cloudy. |
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Morning |
Temperature: 33°F |
| Cloudy with flurries or showers likely. |
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Afternoon |
Temperature: 34°F |
| Cloudy with a chance of flurries or showers. Risk of freezing rain. Windy. |
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Evening |
Temperature: 37°F |
| A mix of cloudy and clear skies. Windy. |
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