Surf Forecasts:
How big are the waves at Castlerock today (30 Jun):
- Morning surf: Morning surf (30 Jun, local time) - 2ft (0.6m), 10s period with WNW swell.
- Afternoon surf: Afternoon surf (30 Jun, local time) - 2ft (0.6m), 9s period with WNW swell.
- Evening surf: Evening surf (30 Jun, local time) - 1.5ft (0.5m), 9s period with NW swell.
The current surf forecast for Castlerock at 5PM is: 0.5m 9s primary swell from a Northwest direction (forecast issued at 12:00pm June 30). An open ocean swell of 0.2m 6s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Jun) | 2ft (0.6m) | 10s |
| Afternoon (30 Jun) | 2ft (0.6m) | 9s |
| Evening (30 Jun) | 1.5ft (0.5m) | 9s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 9mm), mostly falling on Tue morning. Very mild (max 16°C on Tue morning, min 12°C on Wed night). Winds increasing (light winds from the SSE on Tue morning, strong winds from the WNW by Wed night). | ||||||||||||||||||||||||
Tue 30 | Wednesday 1 | Thursday 2 | Fri 3 | |||||||||||||||||||||
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 | 1 AM | 4 AM | 7 AM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | WNW 10 | WNW 9 | WNW 9 | NW 9 | NW 9 | WNW 9 | NW 8 | WNW 8 | WNW 8 | WNW 8 | NW 7 | NW 7 | WNW 9 | W 10 | WNW 7 | NW 8 | NW 8 | NW 8 | NW 8 | NW 7 | NW 7 | NW 9 | NW 9 | NW 9 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 60 | 58 | 56 | 40 | 39 | 31 | 18 | 27 | 26 | 26 | 12 | 13 | 46 | 326 | 372 | 447 | 346 | 264 | 179 | 134 | 86 | 135 | 117 | 99 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | on | on | cross-on | cross | cross | cross | cross-off | off | off | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-off | off | off |
High Tide | 7:03AM1.47m | 7:29PM1.68m | 7:35AM1.48m | 8:04PM1.71m | 8:06AM1.48m | 8:39PM1.72m | ||||||||||||||||||
Low Tide | 1:27PM0.26m | 2:05AM0.36m | 2:00PM0.22m | 2:41AM0.37m | 2:31PM0.20m | 3:15AM0.41m | ||||||||||||||||||
 |  | |  | |  | |  | | | | | | | |  | | | | | |  | | | |
 | 4:50 | — | — | — | — | — | 4:50 | — | — | — | — | — | — | — | 4:50 | — | — | — | — | — | — | — | 4:52 | — |
 | — | — | — | — | 10:09 | — | — | — | — | — | — | — | 10:09 | — | — | — | — | — | — | — | 10:08 | — | — | 10:08 |
mm | 3 | 1 | 2 | — | — | — | — | — | — | 1 | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 16 | 16 | 14 | 13 | 13 | 13 | 13 | 14 | 13 | 13 | 15 | 16 | 14 | 13 | 12 | 14 | 15 | 15 | 15 | 14 | 13 | 12 | 12 |
Feels °C | 12 | 15 | 15 | 12 | 11 | 12 | 11 | 11 | 13 | 11 | 8 | 10 | 10 | 7 | 5 | 6 | 8 | 10 | 10 | 11 | 11 | 10 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 9 | WNW 9 | NW 9 | NW 9 | WNW 9 | NW 8 | WNW 8 | WNW 8 | WNW 8 | NW 7 | NW 7 | WNW 9 | SE 5 | — | — | — | — | — | NW 9 | NW 7 | NW 9 | NW 9 | NW 9 |
| kJ | 60 | 58 | 56 | 40 | 39 | 31 | 18 | 27 | 26 | 26 | 12 | 13 | 46 | 1 | — | — | — | — | — | 43 | 86 | 135 | 117 | 99 |
Swell 2 Height (m) Direction Period (s) | — | ESE 3 | ESE 6 | ESE 5 | E 4 | NW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NW 7 | W 9 | — | — | — | — | — | — | — | — | NW 9 | NNW 11 | W 11 | W 11 |
| kJ | — | 1 | 3 | 4 | 1 | 9 | 5 | 5 | 5 | 5 | 2 | 6 | — | — | — | — | — | — | — | — | 42 | 12 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 14 | E 3 | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 4 | 1 | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 3 | — | — | — | — | — | — | — | — | — | — | S 2 | SW 3 | W 10 | WNW 7 | NW 8 | NW 8 | NW 8 | NW 8 | NW 7 | — | — | — | — |
| kJ | 2 | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 326 | 372 | 447 | 346 | 264 | 179 | 134 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 2 | 8 | 25 | 63 | 78 | 27 | 27 | 42 | 42 | 56 | 390 | 336 | 334 | 382 | 365 | 419 | 339 | 251 | 297 | 300 | 9 | 0 | 0 | 0 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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