Surf Forecasts:
How big are the waves at Castlerock today (29 Sep):
- Morning surf: Morning surf (29 Sep, local time) - 2ft (0.6m), 11s period with WNW swell.
- Afternoon surf: Afternoon surf (29 Sep, local time) - 1.5ft (0.4m), 10s period with NW swell.
- Evening surf: Evening surf (29 Sep, local time) - 0.5ft (0.2m), 10s period with WNW swell.
The current surf forecast for Castlerock at 5PM is: 0.4m 10s primary swell from a Northwest direction (forecast issued at 12:00pm September 29). An open ocean swell of 2.0m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (29 Sep) | 2ft (0.6m) | 11s |
| Afternoon (29 Sep) | 1.5ft (0.4m) | 10s |
| Evening (29 Sep) | 0.5ft (0.2m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 13mm), heaviest on Tue night. Very mild (max 18°C on Tue night, min 10°C on Wed night). Winds decreasing (near gales from the SSE on Tue night, light winds from the SSE by Thu night). | |||||||||||||||||||||
Tue 29 | Wednesday 30 | Thursday 1 | |||||||||||||||||||
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 | NW 11 | NW 10 | WNW 10 | WNW 10 | NW 10 | N 10 | W 14 | W 13 | W 13 | W 12 | WNW 12 | WNW 15 | WNW 15 | WNW 16 | WNW 16 | WNW 15 | NW 14 | NW 14 | WNW 14 | NW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 78 | 55 | 26 | 10 | 10 | 4 | 2 | 4 | 3 | 3 | 3 | 31 | 270 | 730 | 933 | 1225 | 1132 | 1031 | 961 | 833 | 632 |
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-off | cross-off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off |
High Tide | 8:05AM1.78m | 8:25PM1.87m | 8:41AM1.73m | 9:03PM1.71m | 9:21AM1.64m | 9:45PM1.52m | |||||||||||||||
Low Tide | 2:12PM0.07m | 2:38AM0.17m | 2:49PM0.17m | 3:11AM0.28m | 3:34PM0.31m | ||||||||||||||||
 |  | |  |  |  |  | |  | | | |  | | |  | | | | | | |
 | 7:24 | — | — | — | — | — | — | 7:26 | — | — | — | — | — | — | — | 7:28 | — | — | — | — | — |
 | — | — | — | 7:08 | — | — | — | — | — | — | — | 7:06 | — | — | — | — | — | — | — | 7:04 | — |
mm | — | — | — | 1 | — | 2 | 8 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 16 | 17 | 18 | 17 | 15 | 14 | 14 | 15 | 16 | 14 | 12 | 11 | 12 | 10 | 11 | 14 | 15 | 15 | 14 |
Feels °C | 7 | 7 | 7 | 8 | 9 | 13 | 11 | 8 | 6 | 7 | 8 | 8 | 7 | 5 | 6 | 5 | 6 | 9 | 9 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | WNW 11 | NW 11 | NW 10 | WNW 10 | WNW 10 | NW 10 | ESE 6 | W 14 | N 10 | W 13 | W 12 | WNW 12 | WNW 15 | WNW 15 | WNW 16 | WNW 16 | WNW 15 | NW 14 | NW 14 | WNW 14 | NW 13 |
| kJ | 78 | 55 | 26 | 10 | 10 | 4 | 55 | 4 | 2 | 3 | 3 | 31 | 270 | 730 | 933 | 1225 | 1132 | 1031 | 961 | 833 | 632 |
Swell 2 Height (m) Direction Period (s) | — | — | — | N 11 | N 11 | N 10 | N 10 | N 10 | W 13 | N 9 | N 9 | N 10 | N 10 | ESE 6 | — | — | — | — | — | — | — |
| kJ | — | — | — | 2 | 2 | 2 | 2 | 2 | 3 | 2 | 2 | 2 | 2 | 4 | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 12 | N 10 | — | W 10 | W 9 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 3 | 2 | — | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ESE 5 | ESE 6 | ESE 6 | ESE 6 | ESE 7 | SE 6 | — | ESE 6 | SE 4 | SSE 4 | SSE 5 | SE 5 | SE 3 | SSE 3 | SSE 3 | — | S 3 | S 3 | SSE 3 | — | SSE 3 |
| kJ | 97 | 193 | 305 | 382 | 380 | 162 | — | 33 | 20 | 50 | 54 | 23 | 4 | 3 | 3 | — | 2 | 3 | 3 | — | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 340 | 794 | 794 | 751 | 1035 | 558 | 336 | 348 | 266 | 287 | 287 | 273 | 0 | 266 | 14 | 0 | 0 | 0 | 282 | 273 | 9 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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