Castlerock Surf Break

Lat Long: 55.17° N 6.78° W

Castlerock Surf Forecast and Surf Report

Issued: 6 pm 02 Oct 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
14.8°C
1.6° 

Castlerock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Castlerock surf forecast from 2 Oct 2026:

  • Best quality surf: Tuesday 6 Oct, 10PM (local time) - 5.5ft (1.7m), 11s period, NW swell with cross-offshore winds.
  • Most powerful swell: Saturday 10 Oct, 1AM (local time) - 8ft (2.4m), 13s period, WNW swell with 1,799 kJ wave energy.
  • Next surfable swell (1★+): Saturday 3 Oct, 4AM (local time) - 3.5ft (1.1m), 11s period with NW swell.

Best Forecast Surf Conditions for Castlerock this week:

The surf forecast for Castlerock over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Oct 03) at 4AM. The primary swell is predicted to be 1.1m and 11s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Castlerock in the next 16 days are 2.4m 13s and forecast to arrive on Saturday (Oct 10) at 1AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Friday (Oct 09) at 10PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Sat 3rd Oct)3.5ft (1.1m) 11s
Best Surf10PM (Tue 6th Oct)5.5ft (1.7m) 11s
Most Powerful 1AM (Sat 10th Oct)8ft (2.4m) 13s

Table - best surf conditions forecast for Castlerock over the next 16 days.


Short Range Forecast

Light rain (total 4mm), mostly falling on Fri afternoon. Very mild (max 17°C on Sun afternoon, min 10°C on Fri night). Mainly fresh winds.

Days 5-7 Weather Summary

Light rain (total 5mm), mostly falling on Mon afternoon. Very mild (max 15°C on Mon afternoon, min 9°C on Tue night). Mainly fresh winds.

Fri
2
Saturday
3
Sunday
4
Monday
5
Tuesday
6
Wednesday
7
Thursday
8
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
2
1
1
2
0
1
0
2
1
1
1
3
1
0
1
2
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
NW
12
1.2
NW
11
1
NW
10
0.9
WNW
10
0.9
WNW
10
1
NW
11
1.1
NW
11
1.4
NW
13
1.4
NW
11
1.5
NW
11
1.7
NW
12
1.6
NW
10
1.6
NW
10
1.6
NW
11
1.4
NW
10
1.7
NW
10
1.6
NW
11
1.3
NW
11
1.1
NW
11
1.3
WNW
11
Wave Graph
Metric surfscale
Energy kJ
298
347
200
168
178
224
303
659
471
524
846
513
484
553
428
557
574
414
254
375
Wind (km/h)
30
SW
20
WSW
15
SSW
15
SW
20
S
25
SSW
25
SSW
25
SW
25
SW
20
WSW
15
NW
20
WNW
25
WNW
15
WSW
20
WSW
30
WNW
20
WNW
15
SW
30
S
35
SW
Wind State
cross-off
cross-off
off
cross-off
off
off
cross-off
cross-off
cross-off
cross-off
cross-on
cross
cross
cross-off
cross-off
cross-on
cross
cross-off
off
cross-off
High Tide
10:37PM1.30m
11:17AM1.37m
00:01AM1.12m
1:15PM1.32m
2:24AM1.08m
3:10PM1.45m
3:50AM1.20m
4:13PM1.64m
4:39AM1.34m
4:59PM1.80m
5:18AM1.47m
5:37PM1.91m
Low Tide
4:34PM0.48m
4:48AM0.55m
6:16PM0.62m
6:29AM0.65m
8:33PM0.62m
8:29AM0.60m
10:05PM0.48m
9:49AM0.46m
10:59PM0.33m
10:42AM0.31m
11:39PM0.21m
11:25AM0.18m
00:13AM0.13m
rain showers
part cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
light rain
light rain
clear
clear
part cloud
rain showers
rain showers
part cloud
cloud
light rain
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
7:31
—
—
7:33
—
—
7:35
—
—
7:37
—
—
7:39
—
—
7:41
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
—
—
6:59
—
—
6:55
—
—
6:53
—
—
6:51
—
—
6:49
—
—
6:45
—
 mm
4
—
—
—
—
—
—
—
—
2
1
—
—
—
1
1
—
—
2
6
Temp °C
15
11
13
14
12
16
17
16
16
15
12
12
12
10
12
11
10
10
11
15
Feels °C
10
6
9
11
8
12
13
14
12
12
9
7
6
6
5
4
4
5
4
10
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Castlerock Surf forecast

The above surf forecast table for Castlerock provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Castlerock can be found by selecting the local surf guide option on the grey menu. Our Castlerock 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 (Castlerock) 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 Castlerock 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 Londonderry? If you are looking for accommodation near Castlerock, camping, hotels and holiday cottages in Londonderry, consider staying in Coleraine which is 8 km (5 miles) away. Other places in and around Londonderry where you can find information about places to rent, and car hire include Ballycastle which is 34 km (21 miles) away, Ballypatrick, Londonderry County Borough and Derry.

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