Surf Forecasts:
How big are the waves at Castlerock today (12 Oct):
- Morning surf: Morning surf (12 Oct, local time) - 1ft (0.3m), 8s period with NW swell.
- Afternoon surf: Afternoon surf (12 Oct, local time) - 0.5ft (0.2m), 12s period with W swell.
- Evening surf: Evening surf (12 Oct, local time) - 0.5ft (0.2m), 12s period with WNW swell.
The current surf forecast for Castlerock at 10AM is: 0.3m 8s primary swell from a Northwest direction (forecast issued at 06:00am October 12). An open ocean swell of 0.8m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Oct) | 1ft (0.3m) | 8s |
| Afternoon (12 Oct) | 0.5ft (0.2m) | 12s |
| Evening (12 Oct) | 0.5ft (0.2m) | 12s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 13mm), heaviest on Wed night. Very mild (max 18°C on Mon night, min 9°C on Tue night). Winds increasing (light winds from the SSE on Mon morning, strong winds from the W by Tue afternoon). | |||||||||||||||||||||||
Monday 12 | Tuesday 13 | Wednesday 14 | |||||||||||||||||||||
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) | NW 9 | NW 8 | NW 8 | NW 8 | W 12 | WNW 12 | WNW 12 | WNW 12 | WNW 9 | WNW 9 | WNW 8 | W 8 | WNW 8 | WNW 9 | NW 13 | NW 13 | NW 12 | NW 12 | NW 13 | NW 13 | WNW 13 | NW 14 | NW 16 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 50 | 17 | 10 | 11 | 12 | 15 | 14 | 14 | 62 | 31 | 55 | 124 | 259 | 318 | 734 | 639 | 463 | 361 | 376 | 382 | 451 | 799 | 1672 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off | off | off | off | off | off | off | off | off |
High Tide | 7:27AM1.76m | 7:43PM1.79m | 7:56AM1.74m | 8:12PM1.66m | 8:26AM1.68m | 8:40PM1.51m | |||||||||||||||||
Low Tide | 1:35AM0.11m | 1:43PM0.09m | 2:00AM0.17m | 2:15PM0.17m | 2:24AM0.25m | 2:48PM0.29m | |||||||||||||||||
 | |  | | |  |  | | |  | |  |  | | | | | | | | | | | |
 | — | 7:48 | — | — | — | — | — | — | — | 7:50 | — | — | — | — | — | — | — | 7:52 | — | — | — | — | — |
 | — | — | — | — | 6:36 | — | — | — | — | — | — | — | 6:34 | — | — | — | — | — | — | — | 6:30 | — | — |
mm | 1 | 1 | — | — | — | — | — | 1 | 3 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 14 | 15 | 16 | 16 | 17 | 18 | 13 | 13 | 13 | 13 | 12 | 12 | 11 | 10 | 9 | 9 | 12 | 15 | 16 | 16 | 15 |
Feels °C | 7 | 9 | 12 | 14 | 14 | 10 | 12 | 14 | 9 | 8 | 7 | 6 | 3 | 6 | 7 | 6 | 4 | 3 | 5 | 7 | 8 | 9 | 8 |
Swell 1 Height (m) Direction Period (s) | NW 9 | NW 8 | ESE 5 | E 5 | E 5 | WNW 12 | WNW 12 | ESE 4 | WNW 9 | WNW 9 | WNW 8 | NW 14 | NW 14 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 13 | NW 13 | WNW 13 | NW 14 | NW 16 |
| kJ | 50 | 17 | 32 | 21 | 9 | 15 | 14 | 7 | 62 | 31 | 55 | 29 | 89 | 168 | 734 | 639 | 463 | 361 | 376 | 382 | 451 | 799 | 1672 |
Swell 2 Height (m) Direction Period (s) | WNW 10 | WNW 10 | NW 8 | NW 8 | WNW 9 | NW 9 | NW 9 | WNW 12 | ESE 4 | WNW 11 | — | — | — | — | — | — | — | NW 16 | — | — | — | — | — |
| kJ | 18 | 9 | 10 | 11 | 8 | 3 | 3 | 14 | 1 | 12 | — | — | — | — | — | — | — | 38 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | W 15 | WNW 10 | W 12 | W 12 | NW 8 | N 7 | W 9 | SE 6 | ESE 4 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 4 | 9 | 3 | 12 | 2 | 1 | 2 | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ESE 5 | ESE 6 | — | — | — | SE 3 | SE 4 | SSW 4 | WSW 3 | SW 3 | WSW 3 | W 8 | WNW 8 | WNW 9 | — | — | S 2 | SSE 3 | SSE 3 | SSE 4 | S 4 | S 4 | S 4 |
| kJ | 69 | 63 | — | — | — | 8 | 21 | 4 | 4 | 2 | 7 | 124 | 259 | 318 | — | — | 1 | 3 | 6 | 14 | 9 | 9 | 9 |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 109 | 56 | 27 | 42 | 56 | 266 | 270 | 287 | 9 | 254 | 292 | 366 | 347 | 187 | 9 | 0 | 0 | 348 | 480 | 690 | 690 | 480 | 492 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||||
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