| Point Forecast: 18NM NNE Portsmouth NH 43.31N 70.57W (Elev. 10 ft) |
Last Update: 6:37 pm EDT Apr 18, 2026 |
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| Date | 04/18 | 04/19 | ||||||||||||||||||||||
| Hour (EDT) | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| Surface Wind (mph) | 3 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 5 | 4 | 6 | 8 | 10 | 12 | 12 | 12 | 11 | 10 |
| Wind Dir | ENE | ENE | E | E | ESE | SE | SSE | SSE | SSE | SSE | SSE | S | S | S | SSW | SW | WNW | NW | NW | NW | WNW | WNW | WNW | WNW |
| Gust | 21 | 22 | 21 | 20 | ||||||||||||||||||||
| Significant Wave Height (ft) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Wave Period (sec) | 8 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 |
| Wave Direction (°) | ||||||||||||||||||||||||
| Date | 04/20 | |||||||||||||||||||||||
| Hour (EDT) | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| Surface Wind (mph) | 10 | 10 | 9 | 8 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 |
| Wind Dir | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | WNW | WNW | WNW | NW | NW | NNW | NNW |
| Gust | ||||||||||||||||||||||||
| Significant Wave Height (ft) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Wave Period (sec) | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Wave Direction (°) | ||||||||||||||||||||||||


