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 1PM is: 1.3m 11s primary swell from a Northwest direction (forecast issued at 06:00am September 26). 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 6mm), mostly falling on Sun morning. Very mild (max 16°C on Sat morning, min 8°C on Sun night). Mainly fresh winds. | |||||||||||||||||||||||
Saturday 26 | Sunday 27 | Monday 28 | |||||||||||||||||||||
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 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | WNW 10 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 11 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 700 | 625 | 506 | 389 | 338 | 254 | 212 | 208 | 189 | 204 | 143 | 109 | 166 | 251 | 285 | 289 | 255 | 247 | 243 | 211 | 207 | 200 | 200 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | cross-on | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | cross-off | cross-off |
High Tide | 6:27AM1.66m | 6:46PM1.97m | 6:58AM1.73m | 7:17PM2.00m | 7:31AM1.78m | 7:50PM1.96m | |||||||||||||||||
Low Tide | 12:39PM0.06m | 1:14AM0.08m | 1:08PM0.02m | 1:41AM0.06m | 1:39PM0.03m | ||||||||||||||||||
 |  |  |  | | | | |  | |  | |  | | | | | | | | |  | | |
 | — | 7:18 | — | — | — | — | — | — | — | 7:20 | — | — | — | — | — | — | — | 7:22 | — | — | — | — | — |
 | — | — | — | — | — | 7:16 | — | — | — | — | — | — | — | 7:14 | — | — | — | — | — | — | — | 7:12 | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 4 | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 13 | 13 | 16 | 16 | 16 | 14 | 12 | 12 | 14 | 13 | 11 | 12 | 12 | 10 | 10 | 9 | 8 | 10 | 13 | 15 | 14 | 11 |
Feels °C | 8 | 9 | 8 | 11 | 11 | 11 | 10 | 8 | 7 | 9 | 6 | 6 | 8 | 7 | 6 | 6 | 5 | 4 | 6 | 9 | 11 | 10 | 6 |
Swell 1 Height (m) Direction Period (s) | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | WNW 10 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 11 |
| kJ | 700 | 625 | 506 | 389 | 338 | 254 | 212 | 208 | 189 | 204 | 143 | 109 | 166 | 251 | 285 | 289 | 255 | 247 | 243 | 211 | 207 | 200 | 200 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | NW 10 | NW 10 | NW 10 | NNW 9 | — | N 12 | — | — | — | — | — | — | NW 13 |
| kJ | — | — | — | — | — | — | — | — | — | — | 25 | 26 | 25 | 8 | — | 3 | — | — | — | — | — | — | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SE 4 | SE 4 | ESE 6 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 4 | 4 | 4 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 3 | SSW 3 | SSW 3 | SSW 3 | SSW 3 | S 2 | S 2 | SSE 3 | SSE 3 | SSE 4 | SSE 4 | SW 4 | — | — | — | — | — | — | — | — | — | SSE 2 | SE 3 |
| kJ | 3 | 2 | 1 | 2 | 2 | 1 | 1 | 1 | 3 | 11 | 16 | 3 | — | — | — | — | — | — | — | — | — | 1 | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 187 | 9 | 162 | 42 | 414 | 0 | 0 | 0 | 387 | 415 | 83 | 44 | 380 | 180 | 9 | 9 | 0 | 0 | 0 | 0 | 0 | 2 | 2 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||||
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