
Surf Forecasts:
White Rocks surf forecast from 15 Sep 2026:
- Best quality surf: Friday 18 Sep, 4AM (local time) - 11ft (3.5m), 14s period, NW swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 7PM (local time) - 13ft (4.0m), 14s period, NW swell with 6,538 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 4AM (local time) - 11ft (3.5m), 14s period with NW swell.
Best Forecast Surf Conditions for White Rocks this week:
The surf forecast for White Rocks over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 18) at 4AM. The primary swell is predicted to be 3.5m and 14s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at White Rocks in the next 16 days are 4.0m 14s and forecast to arrive on Thursday (Sep 17) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Wednesday (Sep 16) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Fri 18th Sep) | 11ft (3.5m) 14s |
| Best Surf | 4AM (Fri 18th Sep) | 11ft (3.5m) 14s |
| Most Powerful | 7PM (Thu 17th Sep) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for White Rocks over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s chew the fat on the surf coming up at White Rocks.
Looking over the next 16 days, you gotta hang tight because the early part is a dud. The first real session worth wetting a board is not until Sunday the 20th, and before that it’s mostly rubbish. Tuesday the 15th starts with a little 2 ft WNW windswell in a 25 km/h cross-off breeze – clean but too small to matter. Wednesday the 16th pushes to 5 ft from the WNW, but it’s cross-shore with rain showers, so forget it. Thursday the 17th turns on some size with a 6 ft WNW groundswell, but the wind is a strong 35 km/h cross-off making it clean but blown to pieces. By Thursday afternoon, that swell jumps to 12 ft from the NW with a stiff 40 km/h cross breeze and messy chop – that’s huge and ugly, not for the faint-hearted. Friday the 18th morning is a solid 10 ft NW groundswell with a 25 km/h cross-off, and the combined swell energy is a massive 2740 – that’s too big for this break unless you’re an expert, and even then it’s sketchy. Friday afternoon drops to 8 ft NW, still big but cleaner, though it’s touch-and-go on the tide.
The standout comes on Sunday the 20th. Morning brings a 5 ft NW groundswell with a light 10 km/h cross-off breeze and very good conditions. The combined energy is 626, and the water temp is about 59°, a touch warmer than usual for this time of year – nice. The swell direction from the NW is a perfect match for White Rocks, and the afternoon has a light offshore from the southeast, glassing it up. This is the pick of the whole forecast: clean, shoulder-high waves with a 12-second period making the sets fat and fun. Crowds are possible here sometimes, so don’t expect privacy.
After that, Monday the 21st drops to 4 ft WNW with a moderate cross-off, just marginal. Tuesday the 22nd is a sleeper – morning is tiny at 2 ft, but that afternoon serves up a 3 ft NW swell with a long 15-second period, glassy and calm from the ENE. The energy is 501, so those long-period lines won’t be punchy, but they’ll have some push. Worth a paddle.
From Wednesday the 23rd through Saturday the 26th, it’s a mix of small to moderate swells from 2 ft to 4 ft, mostly WNW or NW, with light winds often offshore or glassy – clean but not memorable. Sunday the 27th is tiny and ordinary, with offshore wind keeping it clean but tiny. The last proper highlight is Monday the 28th – a 5 ft NW groundswell in the afternoon with zero wind and glassy conditions. Combined energy is 644, and the swell direction is ideal. Another belter session to finish the run. Then a few offshore mornings on the 29th with 4 ft NW, but it fades to nothing by the 30th.
Top shelf is Sunday the 20th and Monday the 28th for clean conditions, good size, and the right swell direction. Don’t bother before the 20th unless you love paddling around in junk.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Wed night. Very mild (max 15°C on Tue morning, min 11°C on Wed night). Winds increasing (moderate winds from the W on Wed morning, strong winds from the W by Thu afternoon). | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Sun night, min 11°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | WNW 10 | WNW 5 | NW 6 | WNW 11 | WNW 10 | WNW 9 | WNW 10 | NW 13 | NW 14 | NW 13 | NW 12 | NW 11 | WNW 10 | NW 10 | WNW 10 | NW 11 | NW 12 | NW 12 | WNW 12 | WNW 11 | WNW 11 |
Wave Graph | |||||||||||||||||||||
59 | 87 | 124 | 458 | 267 | 262 | 701 | 3612 | 5044 | 2740 | 1500 | 640 | 361 | 281 | 251 | 626 | 798 | 766 | 449 | 317 | 230 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off | off | off | cross-off | cross-on | cross-off |
High Tide | 10:00PM1.81m | 10:26AM1.75m | 10:44PM1.62m | 11:20AM1.63m | 11:45PM1.47m | 1:25PM1.57m | 2:49AM1.42m | 3:06PM1.64m | 4:07AM1.46m | 4:08PM1.73m | 5:08AM1.51m | 4:55PM1.82m | |||||||||
Low Tide | 3:34PM0.53m | 4:24AM0.78m | 4:20PM0.77m | 5:11AM0.95m | 5:21PM0.99m | 6:30AM1.09m | 7:48PM1.14m | 8:30AM1.14m | 9:35PM1.14m | 9:42AM1.12m | 10:54PM1.09m | 10:36AM1.06m | 11:52PM1.01m | ||||||||
6:56 | — | — | 6:58 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — | 7:07 | — | — | |
— | 7:44 | — | — | 7:42 | — | — | 7:38 | — | — | 7:37 | — | — | 7:34 | — | — | 7:30 | — | — | 7:29 | — | |
mm | 1 | 1 | 1 | 1 | — | 3 | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 13 | 15 | 15 | 14 | 13 | 13 | 13 | 15 | 15 | 15 | 15 | 14 | 12 | 13 | 14 | 17 | 19 | 20 | 18 |
Feels °C | 9 | 8 | 8 | 11 | 10 | 9 | 5 | 5 | 8 | 11 | 11 | 12 | 9 | 8 | 7 | 10 | 11 | 16 | 18 | 21 | 19 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | N 9 | WNW 10 | WNW 11 | WNW 10 | WNW 9 | WNW 10 | — | NW 14 | NW 13 | NW 12 | NW 11 | WNW 10 | NW 10 | WNW 10 | NW 11 | NW 12 | NW 12 | WNW 12 | WNW 11 | WNW 11 |
59 | 2 | 20 | 458 | 267 | 262 | 701 | — | 5044 | 2740 | 1500 | 640 | 361 | 281 | 251 | 626 | 798 | 766 | 449 | 317 | 230 | |
Swell 2 Height (m) Direction Period (s) | N 10 | — | NW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2 | — | 39 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | W 5 | WNW 5 | NW 6 | — | — | — | SW 3 | NW 13 | — | — | — | WSW 3 | — | — | — | — | SSW 2 | — | — | — | — |
25 | 87 | 124 | — | — | — | 4 | 3612 | — | — | — | 3 | — | — | — | — | 1 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 389 | 774 | 414 | 146 | 5 | 319 | 328 | 1022 | 414 | 399 | 5 | 5 | 399 | 298 | 199 | 0 | 0 | 0 | 5 | 5 | 0 |
Best forecast wave conditions in Antrim | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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Information about the White Rocks Surf forecast
The above surf forecast table for White Rocks provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at White Rocks can be found by selecting the local surf guide option on the grey menu. Our White Rocks surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (White Rocks) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for White Rocks may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a holiday in Antrim? If you are looking for accommodation near White Rocks, camping, hotels and holiday cottages in Antrim, consider staying in Coleraine which is 11 km (7 miles) away. Other places in and around Antrim where you can find information about places to rent, and car hire include Ballycastle which is 21 km (13 miles) away, Ballypatrick, Ballymena and Malin Head.










