Surf Forecasts:
How big are the waves at Castlerock today (05 Sep):
- Morning surf: Morning surf (05 Sep, local time) - 5ft (1.6m), 11s period with NW swell.
- Afternoon surf: Afternoon surf (05 Sep, local time) - 4.5ft (1.3m), 10s period with NW swell.
- Evening surf: Evening surf (05 Sep, local time) - 3.5ft (1.1m), 9s period with NW swell.
The current surf forecast for Castlerock at 8AM is: 1.6m 11s primary swell from a Northwest direction (forecast issued at 12:00am September 05). The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (05 Sep) | 5ft (1.6m) | 11s |
| Afternoon (05 Sep) | 4.5ft (1.3m) | 10s |
| Evening (05 Sep) | 3.5ft (1.1m) | 9s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 2mm), mostly falling on Sat night. Very mild (max 19°C on Sun afternoon, min 12°C on Fri night). Winds increasing (light winds from the SW on Sat afternoon, fresh winds from the SW by Mon afternoon). | ||||||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | ||||||||||||||||||||||
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 12 | NW 12 | NW 11 | NW 11 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NNW 8 | NW 8 | NW 8 | NW 8 | NW 8 | WNW 10 | WNW 11 | WNW 8 | WNW 7 | WNW 7 | WNW 13 | WNW 12 | WNW 13 | WNW 13 | WNW 12 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 1536 | 990 | 703 | 533 | 334 | 262 | 217 | 156 | 109 | 45 | 66 | 29 | 16 | 16 | 20 | 40 | 13 | 20 | 41 | 67 | 241 | 497 | 809 | 722 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | off | off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 00:04AM1.23m | 1:05PM1.23m | 2:14AM1.15m | 3:13PM1.33m | 3:55AM1.24m | 4:26PM1.54m | ||||||||||||||||||
Low Tide | 6:33AM0.65m | 8:00PM0.66m | 8:41AM0.64m | 10:04PM0.55m | 10:11AM0.50m | |||||||||||||||||||
 |  |  |  | | | |  | |  | | | | | | | | | |  | | | | | |
 | — | 6:39 | — | — | — | — | — | — | — | 6:41 | — | — | — | — | — | — | — | 6:43 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:10 | — | — | — | — | — | — | — | 8:07 | — | — | — | — | — | — | — | 8:06 | — |
mm | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 12 | 14 | 16 | 17 | 16 | 15 | 14 | 14 | 16 | 17 | 18 | 19 | 19 | 15 | 14 | 13 | 13 | 14 | 16 | 16 | 13 | 13 |
Feels °C | 7 | 8 | 8 | 10 | 13 | 15 | 15 | 11 | 10 | 11 | 14 | 14 | 14 | 15 | 16 | 11 | 11 | 9 | 8 | 7 | 9 | 8 | 6 | 5 |
Swell 1 Height (m) Direction Period (s) | NW 12 | NW 12 | NW 11 | NW 11 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NNW 8 | NW 8 | NW 8 | NW 8 | NW 8 | ESE 4 | WNW 11 | WNW 8 | WNW 7 | WNW 7 | WNW 8 | WNW 12 | WNW 13 | WNW 13 | WNW 12 |
| kJ | 1223 | 990 | 703 | 533 | 334 | 262 | 217 | 156 | 109 | 45 | 66 | 29 | 16 | 16 | 3 | 40 | 12 | 20 | 34 | 44 | 241 | 497 | 809 | 722 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | WNW 9 | — | WNW 8 | WNW 8 | WNW 8 | WNW 10 | ESE 4 | WNW 11 | W 11 | WNW 14 | WNW 13 | SSE 4 | — | — | NW 15 |
| kJ | — | — | — | — | — | — | — | — | — | 30 | — | 14 | 14 | 14 | 20 | 3 | 13 | 10 | 41 | 67 | 1 | — | — | 220 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | E 6 | — | E 7 | NNW 8 | NNW 8 | E 4 | NW 16 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 1 | 6 | 6 | 1 | 10 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WNW 12 | — | — | — | — | — | — | — | — | SSE 3 | SE 3 | SSE 3 | SSE 3 | SSE 3 | S 3 | WSW 3 | WSW 3 | SW 2 | SSW 2 | S 3 | W 3 | WSW 4 | SW 4 | SW 4 |
| kJ | 1536 | — | — | — | — | — | — | — | — | 1 | 2 | 1 | 5 | 6 | 2 | 1 | 1 | 1 | 1 | 2 | 10 | 17 | 14 | 12 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 380 | 387 | 162 | 54 | 9 | 0 | 0 | 2 | 0 | 0 | 0 | 404 | 404 | 398 | 419 | 339 | 187 | 27 | 14 | 323 | 559 | 559 | 559 | 380 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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