Surf Forecasts:
How big are the waves at Castlerock today (04 Oct):
- Morning surf: Morning surf (04 Oct, local time) - 3ft (0.9m), 11s period with WNW swell.
- Afternoon surf: Afternoon surf (04 Oct, local time) - 3.5ft (1.1m), 11s period with NW swell.
- Evening surf: Evening surf (04 Oct, local time) - 4.5ft (1.4m), 13s period with NW swell.
The current surf forecast for Castlerock at 8PM is: 1.3m 13s primary swell from a Northwest direction and 0.7m 14s secondary swell from a Northwest direction (forecast issued at 12:00pm October 04). An open ocean swell of 0.3m 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 (04 Oct) | 3ft (0.9m) | 11s |
| Afternoon (04 Oct) | 3.5ft (1.1m) | 11s |
| Evening (04 Oct) | 4.5ft (1.4m) | 13s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 6mm), mostly falling on Mon afternoon. Very mild (max 18°C on Sun afternoon, min 9°C on Tue night). Winds decreasing (fresh winds from the SW on Sun night, light winds from the WNW by Mon night). | |||||||||||||||||||||
Sun 4 | Monday 5 | Tuesday 6 | |||||||||||||||||||
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) | NW 11 | NW 11 | NW 11 | NW 13 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 13 | NW 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 224 | 263 | 297 | 535 | 732 | 814 | 699 | 625 | 660 | 593 | 515 | 652 | 1179 | 1185 | 884 | 699 | 515 | 441 | 362 | 318 | 318 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-on | cross-on | cross-on | cross |
High Tide | 1:15PM1.32m | 2:24AM1.08m | 3:10PM1.45m | 3:50AM1.20m | 4:13PM1.64m | ||||||||||||||||
Low Tide | 8:33PM0.62m | 8:29AM0.60m | 10:05PM0.48m | 9:49AM0.46m | |||||||||||||||||
 | | |  | | |  | | | |  |  | | | | |  | | | |  | |
 | 7:33 | — | — | — | — | — | — | 7:35 | — | — | — | — | — | — | — | 7:37 | — | — | — | — | — |
 | — | — | 6:55 | — | — | — | — | — | — | — | 6:53 | — | — | — | — | — | — | — | 6:51 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 1 | 1 | 1 | — | — | — | — | — |
Temp °C | 14 | 16 | 18 | 17 | 16 | 16 | 15 | 16 | 16 | 15 | 13 | 12 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 11 | 10 |
Feels °C | 11 | 13 | 15 | 14 | 13 | 12 | 10 | 12 | 13 | 12 | 10 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 7 |
Swell 1 Height (m) Direction Period (s) | NW 11 | NW 11 | NW 11 | NW 13 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 13 | NW 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 |
| kJ | 224 | 263 | 297 | 535 | 732 | 814 | 699 | 625 | 660 | 593 | 515 | 652 | 1179 | 1185 | 884 | 699 | 515 | 441 | 362 | 318 | 318 |
Swell 2 Height (m) Direction Period (s) | — | — | — | NW 14 | — | — | NW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 181 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 3 | SSW 3 | SW 3 | SSW 3 | SW 3 | SSW 2 | WSW 3 | SW 3 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 3 | 3 | 2 | 2 | 2 | 1 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 9 | 9 | 9 | 9 | 387 | 387 | 387 | 9 | 9 | 162 | 27 | 9 | 9 | 9 | 9 | 9 | 131 | 71 | 9 | 9 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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