Surf Forecasts:
How big are the waves at Castlerock today (04 Sep):
- Morning surf: Morning surf (04 Sep, local time) - 8ft (2.4m), 12s period with WNW swell.
- Afternoon surf: Afternoon surf (04 Sep, local time) - 7.5ft (2.3m), 12s period with WNW swell.
- Evening surf: Evening surf (04 Sep, local time) - 7ft (2.1m), 12s period with NW swell.
The current surf forecast for Castlerock at 8PM is: 2.4m 12s primary swell from a West-northwest direction and 2.1m 12s secondary swell from a West-northwest direction (forecast issued at 12:00pm September 04). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (04 Sep) | 8ft (2.4m) | 12s |
| Afternoon (04 Sep) | 7.5ft (2.3m) | 12s |
| Evening (04 Sep) | 7ft (2.1m) | 12s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastSome drizzle, heaviest during Sun afternoon. Very mild (max 19°C on Sun afternoon, min 12°C on Fri night). Winds decreasing (strong winds from the W on Fri morning, calm by Sat afternoon). | |||||||||||||||||||||
Fri 4 | Saturday 5 | Sunday 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) | WNW 12 | WNW 12 | WNW 12 | WNW 12 | NW 12 | NW 12 | NW 12 | NW 11 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NNW 8 | NW 8 | NW 8 | NW 8 | WNW 9 | WNW 11 | WNW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1707 | 1640 | 1361 | 1707 | 1327 | 1059 | 913 | 635 | 523 | 327 | 257 | 217 | 156 | 109 | 45 | 66 | 31 | 16 | 15 | 41 | 46 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | glassy | cross | cross-off | off | off | off | off | off | off | cross-off | cross-off |
High Tide | 11:21AM1.31m | 00:04AM1.23m | 1:05PM1.23m | 2:14AM1.15m | 3:13PM1.33m | ||||||||||||||||
Low Tide | 5:44PM0.59m | 6:33AM0.65m | 8:00PM0.66m | 8:41AM0.64m | |||||||||||||||||
 | | |  |  | |  |  | | | | |  | | | | | |  | | | |
 | 6:37 | — | — | — | — | — | 6:39 | — | — | — | — | — | — | — | 6:41 | — | — | — | — | — | — |
 | — | — | — | 8:13 | — | — | — | — | — | — | — | 8:10 | — | — | — | — | — | — | — | 8:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — |
Temp °C | 15 | 15 | 15 | 14 | 13 | 13 | 13 | 12 | 13 | 16 | 17 | 16 | 15 | 14 | 14 | 16 | 17 | 17 | 19 | 19 | 15 |
Feels °C | 7 | 7 | 8 | 7 | 7 | 7 | 8 | 8 | 9 | 13 | 16 | 14 | 11 | 9 | 10 | 14 | 14 | 13 | 16 | 15 | 11 |
Swell 1 Height (m) Direction Period (s) | — | — | — | WNW 12 | NW 12 | NW 12 | NW 12 | NW 11 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NNW 8 | NW 8 | NW 8 | NW 8 | WNW 9 | WNW 11 | WNW 12 |
| kJ | — | — | — | 1707 | 1327 | 1059 | 913 | 635 | 523 | 327 | 257 | 217 | 156 | 109 | 45 | 66 | 31 | 16 | 15 | 41 | 46 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 9 | E 5 | WNW 8 | WNW 8 | NNW 8 | ESE 4 | ESE 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 30 | 1 | 14 | 14 | 6 | 3 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 6 | — | E 7 | NNW 8 | NW 8 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 1 | 6 | 2 |
Wind waves Height (m) Direction Period (s) | WNW 12 | WNW 12 | WNW 12 | WNW 12 | — | — | — | — | — | — | — | — | — | SSE 2 | SSE 3 | SE 3 | SSE 3 | SSE 3 | SSE 3 | SW 3 | SW 3 |
| kJ | 1707 | 1640 | 1361 | 1320 | — | — | — | — | — | — | — | — | — | 1 | 3 | 2 | 1 | 5 | 9 | 2 | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 411 | 780 | 772 | 380 | 380 | 380 | 387 | 9 | 187 | 0 | 0 | 2 | 2 | 83 | 0 | 0 | 404 | 404 | 404 | 393 | 404 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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