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Nassau Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  |  |  | | | |  | | | |  |
| Partly Sunny | Chance of T-Storm | Chance of Showers | Chance of Showers | Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Partly Cloudy |
| Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 61°FLo: 16°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C |
| POP: 70% | POP: 40% | POP: 50% | POP: 60% | POP: 50% | POP: 50% | POP: 50% | POP: 40% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 400 AM EDT Sun Sep 20 2026 
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Issued: 717 AM EDT Sun Sep 20 2026
Key Messages
1. A cold front moves through the region late today into tonight, bringing rain at times through the day.
2. A stationary front south of the region could keep rain chances around, especially for Delmarva through mid week.
3. A closed mid-level low ejecting from the Ohio Valley could help to spin up surface low pressure off our coast by Thursday, potentially bringing another chance for rain.
4. There will be an increasing risk for coastal/tidal flooding through the second half of the wee...