Surf Forecasts:
How big are the waves at Castlerock today (10 Sep):
- Morning surf: Morning surf (10 Sep, local time) - 1.5ft (0.4m), 7s period with NW swell.
- Afternoon surf: Afternoon surf (10 Sep, local time) - 1.5ft (0.4m), 11s period with WNW swell.
- Evening surf: Evening surf (10 Sep, local time) - 1.5ft (0.5m), 8s period with WNW swell.
The current surf forecast for Castlerock at 5AM is: 0.4m 7s primary swell from a Northwest direction and 0.3m 8s secondary swell from a West-northwest direction (forecast issued at 12:00am September 10). The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (10 Sep) | 1.5ft (0.4m) | 7s |
| Afternoon (10 Sep) | 1.5ft (0.4m) | 11s |
| Evening (10 Sep) | 1.5ft (0.5m) | 8s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 12mm), heaviest on Fri night. Very mild (max 17°C on Thu afternoon, min 12°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | ||||||||||||||||||||||
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 | 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 8 | NW 7 | WNW 7 | WNW 8 | WNW 9 | WNW 11 | WNW 12 | WNW 8 | WNW 12 | WNW 6 | NW 7 | NW 8 | NW 8 | NW 9 | NW 12 | NW 12 | NW 11 | NW 13 | NW 13 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 28 | 14 | 21 | 11 | 15 | 40 | 77 | 38 | 31 | 58 | 63 | 132 | 135 | 123 | 138 | 435 | 268 | 609 | 649 | 629 | 688 | 688 | 574 | 555 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross | off | off | off | off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross |
High Tide | 6:13AM1.60m | 6:36PM2.05m | 6:48AM1.67m | 7:11PM2.08m | 7:21AM1.71m | 7:44PM2.04m | ||||||||||||||||||
Low Tide | 00:37AM0.11m | 12:25PM0.03m | 1:11AM0.05m | 12:59PM-0.04m | 1:42AM0.04m | 1:33PM-0.05m | ||||||||||||||||||
 | |  |  | | |  |  |  | |  | | | | | |  |  | |  | | | | | |
 | — | 6:48 | — | — | — | — | — | — | — | 6:50 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 7:58 | — | — | — | — | — | — | — | 7:54 | — | — | — | — | — | — | — | 7:52 | — |
mm | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | 4 | 2 | 1 | 3 | — | — | — | — |
Temp °C | 12 | 12 | 13 | 13 | 15 | 17 | 16 | 14 | 14 | 12 | 13 | 14 | 15 | 16 | 16 | 14 | 14 | 15 | 16 | 16 | 14 | 14 | 14 | 12 |
Feels °C | 8 | 8 | 7 | 8 | 11 | 14 | 12 | 10 | 9 | 7 | 9 | 10 | 12 | 14 | 13 | 10 | 7 | 9 | 13 | 14 | 11 | 11 | 11 | 10 |
Swell 1 Height (m) Direction Period (s) | NW 8 | NW 7 | WNW 7 | WNW 8 | SE 4 | WNW 11 | WNW 12 | WNW 8 | WNW 12 | WNW 11 | NW 7 | NW 8 | NW 8 | NW 9 | NW 9 | NW 12 | NW 11 | NW 13 | NW 13 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 |
| kJ | 28 | 14 | 21 | 11 | 4 | 40 | 77 | 38 | 27 | 22 | 63 | 132 | 135 | 123 | 138 | 435 | 268 | 609 | 649 | 629 | 688 | 688 | 574 | 555 |
Swell 2 Height (m) Direction Period (s) | NNW 7 | WNW 8 | NNW 7 | NW 7 | WNW 9 | ESE 4 | SE 4 | WNW 12 | — | — | WNW 10 | W 10 | — | NW 12 | NW 12 | — | NW 14 | — | — | — | — | — | — | — |
| kJ | 18 | 11 | 5 | 2 | 15 | 1 | 1 | 28 | — | — | 10 | 2 | — | 48 | 137 | — | 218 | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | NNW 7 | W 12 | N 7 | NW 7 | SE 6 | E 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 5 | 3 | 1 | 2 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SE 3 | SSE 3 | S 3 | SW 3 | WSW 3 | W 3 | WNW 6 | WNW 6 | — | — | — | — | — | — | SSE 3 | S 3 | SSE 4 | SSE 4 | WSW 3 | — | — | — |
| kJ | — | — | 2 | 7 | 3 | 2 | 3 | 5 | 31 | 58 | — | — | — | — | — | — | 2 | 5 | 7 | 5 | 2 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 14 | 118 | 390 | 162 | 187 | 254 | 254 | 300 | 364 | 339 | 302 | 162 | 9 | 0 | 0 | 0 | 431 | 387 | 9 | 387 | 251 | 378 | 27 | 9 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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