Surf Forecasts:
How big are the waves at Castlerock today (26 Sep):
- Morning surf: Morning surf (26 Sep, local time) - 4.5ft (1.4m), 12s period with NW swell.
- Afternoon surf: Afternoon surf (26 Sep, local time) - 4ft (1.2m), 11s period with NW swell.
- Evening surf: Evening surf (26 Sep, local time) - 3.5ft (1.1m), 10s period with NW swell.
The current surf forecast for Castlerock at 1AM is: 1.6m 13s primary swell from a Northwest direction (forecast issued at 06:00pm September 25). 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 (26 Sep) | 4.5ft (1.4m) | 12s |
| Afternoon (26 Sep) | 4ft (1.2m) | 11s |
| Evening (26 Sep) | 3.5ft (1.1m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 8mm), mostly falling on Sun morning. Very mild (max 17°C on Sat afternoon, min 9°C on Sun night). Mainly fresh winds. | |||||||||||||||||||
Fri 25 | Saturday 26 | Sunday 27 | |||||||||||||||||
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 14 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 12 | WNW 12 | WNW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 1407 | 1042 | 905 | 760 | 700 | 625 | 506 | 389 | 303 | 249 | 216 | 212 | 196 | 200 | 143 | 143 | 169 | 289 | 280 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | cross-off | cross-off | cross-off | cross-off |
High Tide | 6:16PM1.88m | 6:27AM1.66m | 6:46PM1.97m | 6:58AM1.73m | 7:17PM2.00m | ||||||||||||||
Low Tide | 00:47AM0.14m | 12:39PM0.06m | 1:14AM0.08m | 1:08PM0.02m | |||||||||||||||
 |  |  |  | | | |  | | | | | |  |  |  | | | | |
 | — | — | — | — | — | 7:18 | — | — | — | — | — | — | — | 7:20 | — | — | — | — | — |
 | — | 7:19 | — | — | — | — | — | — | — | 7:16 | — | — | — | — | — | — | — | 7:14 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 7 | — | — | — |
Temp °C | 15 | 14 | 12 | 13 | 13 | 12 | 13 | 15 | 17 | 16 | 14 | 12 | 12 | 14 | 13 | 11 | 13 | 12 | 11 |
Feels °C | 10 | 9 | 6 | 6 | 7 | 7 | 7 | 10 | 12 | 11 | 10 | 8 | 7 | 8 | 7 | 8 | 9 | 8 | 8 |
Swell 1 Height (m) Direction Period (s) | NW 14 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 12 | WNW 12 | WNW 12 |
| kJ | 1407 | 1042 | 905 | 760 | 700 | 625 | 506 | 389 | 303 | 249 | 216 | 212 | 196 | 200 | 143 | 143 | 169 | 289 | 280 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 10 | NW 10 | NW 10 | ESE 6 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 25 | 26 | 24 | 4 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 4 | SE 4 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 2 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | S 3 | S 3 | SSW 3 | SSW 3 | SSW 3 | SSW 3 | S 3 | S 2 | SSE 3 | SSE 3 | SSE 3 | SSE 4 | — | — | — | — |
| kJ | — | — | — | 1 | 2 | 3 | 1 | 3 | 3 | 1 | 1 | 3 | 3 | 9 | 13 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 9 | 9 | 25 | 387 | 187 | 9 | 387 | 25 | 414 | 387 | 0 | 0 | 419 | 172 | 187 | 0 | 339 | 336 | 0 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
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