Downhill Surf Break

Lat Long: 55.17° N 6.84° W

Downhill Surf Forecast and Surf Report

Issued: 6 pm 21 Sep 2026 (local time)

Forecast update in  hr  min

Today's Downhill sea temperature is
15.2°C
1.6° 

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


Downhill surf forecast from 21 Sep 2026:

  • Best quality surf: Wednesday 23 Sep, 7PM (local time) - 4ft (1.2m), 12s period, NW swell with glassy winds.
  • Most powerful swell: Friday 25 Sep, 7AM (local time) - 7.5ft (2.3m), 17s period, NW swell with 2,878 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 22 Sep, 1AM (local time) - 2.5ft (0.7m), 11s period with NW swell.

Best Forecast Surf Conditions for Downhill this week:

The surf forecast for Downhill over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 22) at 1AM. The primary swell is predicted to be 0.7m and 11s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Downhill in the next 16 days are 2.3m 17s and forecast to arrive on Friday (Sep 25) at 7AM. 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 4s period and expected on Thursday (Sep 24) at 1PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Tue 22nd Sep)2.5ft (0.7m) 11s
Best Surf 7PM (Wed 23rd Sep)4ft (1.2m) 12s
Most Powerful 7AM (Fri 25th Sep)7.5ft (2.3m) 17s

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


Short Range Forecast

Moderate rain (total 19mm), heaviest on Tue night. Warm (max 22°C on Mon afternoon, min 9°C on Wed night). Winds increasing (calm on Wed afternoon, fresh winds from the S by Thu morning).

Days 5-7 Weather Summary

Moderate rain (total 11mm), heaviest on Thu night. Very mild (max 17°C on Thu afternoon, min 11°C on Thu night). Mainly fresh winds.

Mon
21
Tuesday
22
Wednesday
23
Thursday
24
Friday
25
Saturday
26
Sunday
27
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
1
0
0
0
0
2
0
0
3
2
2
2
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
NW
11
0.7
NW
11
0.8
WNW
10
0.6
WNW
10
1.3
NW
14
1.4
NW
13
1.3
NW
12
1.1
NW
11
0.8
NW
10
0.8
NW
10
1.7
NW
16
2.2
NW
16
1.9
NW
14
1.5
NW
13
1.4
NW
12
1.2
NW
11
1.1
NW
11
0.9
NW
10
0.9
WNW
10
0.8
WNW
10
Wave Graph
Metric surfscale
Energy kJ
176
115
123
80
648
623
471
268
153
127
1548
2404
1500
712
561
380
263
142
154
127
Wind (km/h)
15
SW
15
SSE
15
S
10
NNW
15
NNW
20
NW
15
NNW
15
SSE
25
SSE
30
S
15
WSW
20
SW
20
SW
20
SSW
25
SSW
30
SSW
20
SW
25
SSE
20
SW
15
SSW
Wind State
cross
cross-off
cross-off
on
on
on
on
off
cross-off
cross-off
cross
cross
cross
cross-off
cross-off
cross-off
cross
cross-off
cross
cross-off
High Tide
4:26PM1.59m
4:41AM1.45m
5:01PM1.76m
5:12AM1.60m
5:30PM1.93m
5:40AM1.74m
5:58PM2.09m
6:09AM1.88m
6:25PM2.22m
6:39AM1.99m
6:55PM2.32m
7:09AM2.08m
7:26PM2.36m
Low Tide
10:48PM0.74m
10:38AM0.62m
11:23PM0.56m
11:14AM0.44m
11:52PM0.39m
11:44AM0.28m
00:19AM0.24m
12:13PM0.14m
00:46AM0.12m
12:43PM0.05m
1:14AM0.04m
1:13PM-0.00m
1:42AM0.01m
clear
clear
light rain
light rain
rain showers
clear
clear
part cloud
cloud
light rain
light rain
part cloud
cloud
cloud
clear
part cloud
light rain
light rain
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:11
7:13
7:15
7:16
7:18
7:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:30
7:27
7:24
7:22
7:19
7:16
7:14
 mm
1
3
15
1
4
1
5
Temp °C
22
19
16
13
12
13
13
11
15
17
12
14
15
13
15
16
14
14
14
12
Feels °C
21
17
14
12
10
9
10
9
9
14
9
9
11
9
9
10
8
8
10
7
  • 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 Downhill Surf forecast

The above surf forecast table for Downhill provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Downhill can be found by selecting the local surf guide option on the grey menu. Our Downhill 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 (Downhill) 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 Downhill 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 Downhill, camping, hotels and holiday cottages in Londonderry, consider staying in Coleraine which is 11 km (7 miles) away. Other places in and around Londonderry where you can find information about places to rent, and car hire include Derry which is 36 km (22 miles) away, Londonderry County Borough, Ballycastle and Derry.

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