Surf Forecasts:
How big are the waves at Castlerock today (04 Sep):
- Morning surf: Morning surf (04 Sep, local time) - 6ft (1.9m), 12s period with WNW swell.
- Afternoon surf: Afternoon surf (04 Sep, local time) - 7ft (2.2m), 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 6AM is: 1.4m 11s primary swell from a West-northwest direction and 0.1m 8s secondary swell from a North direction (forecast issued at 12:00am September 04). An open ocean swell of 0.5m 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 (04 Sep) | 6ft (1.9m) | 12s |
| Afternoon (04 Sep) | 7ft (2.2m) | 12s |
| Evening (04 Sep) | 7ft (2.1m) | 12s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 4mm), mostly falling on Thu night. Very mild (max 19°C on Sun afternoon, min 12°C on Fri night). Winds decreasing (strong winds from the W on Fri afternoon, light winds from the ESE by Sat afternoon). | ||||||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||||||||||||
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) | WNW 11 | WNW 11 | WNW 12 | NW 12 | WNW 12 | WNW 12 | NW 12 | NW 12 | NW 12 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NW 8 | NW 8 | WNW 9 | NW 8 | NW 8 | WNW 9 | WNW 11 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 180 | 242 | 615 | 1388 | 1640 | 1361 | 1344 | 1284 | 1112 | 730 | 599 | 494 | 369 | 262 | 217 | 156 | 109 | 33 | 55 | 30 | 17 | 17 | 16 | 43 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | off |
High Tide | 10:51PM1.42m | 11:21AM1.31m | 00:04AM1.23m | 1:05PM1.23m | 2:14AM1.15m | 3:13PM1.33m | ||||||||||||||||||
Low Tide | 5:07AM0.54m | 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 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 15 | 13 | 13 | 14 | 16 | 15 | 14 | 13 | 13 | 13 | 12 | 14 | 16 | 16 | 16 | 15 | 14 | 14 | 15 | 16 | 17 | 19 | 19 | 18 |
Feels °C | 11 | 7 | 6 | 7 | 9 | 8 | 7 | 7 | 7 | 8 | 8 | 10 | 13 | 13 | 14 | 12 | 10 | 11 | 12 | 13 | 12 | 16 | 16 | 14 |
Swell 1 Height (m) Direction Period (s) | WNW 11 | WNW 11 | WNW 12 | NW 12 | — | — | — | NW 12 | NW 12 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NW 8 | NW 8 | NNW 8 | NW 8 | NW 8 | WNW 9 | WNW 11 |
| kJ | 180 | 242 | 615 | 1388 | — | — | — | 1284 | 1112 | 730 | 599 | 494 | 369 | 262 | 217 | 156 | 109 | 33 | 55 | 23 | 17 | 17 | 16 | 43 |
Swell 2 Height (m) Direction Period (s) | N 9 | N 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 9 | — | WNW 9 | WNW 9 | WNW 9 | NNW 8 | ESE 4 |
| kJ | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 30 | — | 30 | 16 | 15 | 6 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 6 | E 7 | SE 7 | SE 7 | NNW 8 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 2 | 2 | 6 |
Wind waves Height (m) Direction Period (s) | SW 2 | SW 3 | SW 3 | W 4 | WNW 12 | WNW 12 | NW 12 | — | — | — | — | — | — | — | — | — | SSE 2 | SSE 3 | SE 3 | SSE 3 | SSE 3 | SSE 3 | SSE 4 | SSW 3 |
| kJ | 1 | 2 | 5 | 19 | 1640 | 1361 | 1344 | — | — | — | — | — | — | — | — | — | 1 | 3 | 3 | 4 | 6 | 8 | 9 | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 9 | 300 | 404 | 555 | 780 | 771 | 380 | 380 | 380 | 364 | 9 | 9 | 9 | 0 | 0 | 0 | 0 | 0 | 8 | 8 | 194 | 390 | 398 | 404 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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