Surf Forecasts:
How big are the waves at Castlerock today (07 Sep):
- Morning surf: Morning surf (07 Sep, local time) - 2.5ft (0.8m), 8s period with WNW swell.
- Afternoon surf: Afternoon surf (07 Sep, local time) - 3.5ft (1.1m), 10s period with NW swell.
- Evening surf: Evening surf (07 Sep, local time) - 4.5ft (1.4m), 11s period with NW swell.
The current surf forecast for Castlerock at 11AM is: 0.8m 8s primary swell from a West-northwest direction and 0.3m 14s secondary swell from a West-northwest direction (forecast issued at 06:00am September 07). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (07 Sep) | 2.5ft (0.8m) | 8s |
| Afternoon (07 Sep) | 3.5ft (1.1m) | 10s |
| Evening (07 Sep) | 4.5ft (1.4m) | 11s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Mon afternoon. Very mild (max 16°C on Mon morning, min 12°C on Mon night). Winds decreasing (strong winds from the WNW on Tue afternoon, light winds from the SW by Wed afternoon). | |||||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||||||||
4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | WNW 7 | WNW 8 | WNW 8 | WNW 10 | NW 10 | WNW 10 | WNW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 11 | NW 11 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | WNW 8 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 19 | 50 | 86 | 229 | 239 | 361 | 553 | 593 | 561 | 1070 | 1267 | 1370 | 1848 | 1942 | 1597 | 1170 | 798 | 566 | 354 | 180 | 99 | 58 | 43 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | off |
High Tide | 3:55AM1.24m | 4:26PM1.54m | 4:53AM1.37m | 5:16PM1.76m | 5:36AM1.49m | 5:58PM1.94m | |||||||||||||||||
Low Tide | 10:11AM0.50m | 11:12PM0.38m | 11:05AM0.32m | 11:58PM0.22m | 11:48AM0.16m | ||||||||||||||||||
 |  | |  |  | |  |  | |  | |  | | | | | | | | | | | | |
 | 6:43 | — | — | — | — | — | — | — | 6:45 | — | — | — | — | — | — | — | 6:46 | — | — | — | — | — | — |
 | — | — | — | — | — | 8:06 | — | — | — | — | — | — | — | 8:02 | — | — | — | — | — | — | — | 8:00 | — |
mm | — | — | — | — | 1 | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 14 | 14 | 16 | 15 | 14 | 12 | 12 | 12 | 13 | 13 | 14 | 14 | 13 | 14 | 13 | 13 | 12 | 13 | 15 | 15 | 15 | 14 |
Feels °C | 9 | 10 | 10 | 11 | 9 | 7 | 5 | 5 | 5 | 6 | 5 | 6 | 5 | 5 | 6 | 6 | 8 | 8 | 9 | 10 | 11 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | WNW 7 | WNW 8 | WNW 8 | WNW 10 | NW 10 | WNW 10 | WNW 11 | NW 11 | NW 11 | — | — | — | — | — | — | — | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | WNW 8 |
| kJ | 19 | 50 | 86 | 229 | 239 | 361 | 553 | 593 | 561 | — | — | — | — | — | — | — | 798 | 566 | 354 | 180 | 99 | 58 | 43 |
Swell 2 Height (m) Direction Period (s) | W 11 | WNW 15 | WNW 14 | — | — | — | — | — | NW 13 | — | — | — | — | — | — | — | — | — | — | WNW 9 | WNW 8 | WNW 8 | N 8 |
| kJ | 9 | 21 | 39 | — | — | — | — | — | 172 | — | — | — | — | — | — | — | — | — | — | 49 | 47 | 45 | 29 |
Swell 3 Height (m) Direction Period (s) | NW 16 | — | NW 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 10 | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 2 | SW 2 | SW 2 | SW 3 | WSW 3 | WSW 3 | WSW 3 | SW 3 | WSW 3 | NW 11 | NW 10 | NW 10 | NW 11 | NW 11 | NNW 11 | NNW 10 | — | — | — | — | — | — | — |
| kJ | 1 | 1 | 1 | 2 | 6 | 7 | 7 | 8 | 10 | 1070 | 1267 | 1370 | 1848 | 1942 | 1597 | 1170 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 27 | 9 | 9 | 771 | 559 | 387 | 540 | 339 | 300 | 300 | 413 | 613 | 1174 | 862 | 587 | 587 | 187 | 309 | 162 | 54 | 0 | 0 | 0 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||||
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