Cave Surf Break

Lat Long: 38.99° N 9.42° W

Cave Surf Forecast and Surf Report

Issued: 6 pm 17 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cave sea temperature is
18.6°C
1.7° 

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


Cave surf forecast from 18 Sep 2026:

  • Best quality surf: Friday 18 Sep, 10PM (local time) - 8ft (2.5m), 15s period, NNW swell with cross-shore winds.
  • Most powerful swell: Friday 18 Sep, 10PM (local time) - 8ft (2.5m), 15s period, NNW swell with 3,156 kJ wave energy.
  • Next surfable swell (1★+): Friday 18 Sep, 10PM (local time) - 8ft (2.5m), 15s period with NNW swell.

Best Forecast Surf Conditions for Cave this week:

The surf forecast for Cave over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 18) at 10PM. The primary swell is predicted to be 2.5m and 15s period with a secondary swell of 0.1m and 14s. Another secondary swell of 1.8m and 9s is also forecast. The wind is predicted to be cross-shore as the swell arrives.

The most powerful waves expected at Cave in the next 16 days are 2.5m 15s and forecast to arrive on Friday (Sep 18) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Fri 18th Sep)8ft (2.5m) 15s
Best Surf10PM (Fri 18th Sep)8ft (2.5m) 15s
Most Powerful10PM (Fri 18th Sep)8ft (2.5m) 15s

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


Short Range Forecast

Mostly dry. Warm (max 27°C on Sun morning, min 17°C on Thu night). Winds decreasing (strong winds from the N on Thu afternoon, calm by Sat morning).

Days 5-7 Weather Summary

Mostly dry. Warm (max 28°C on Mon morning, min 19°C on Tue night). Wind will be generally light.

Thu
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wednesday
23
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
!
0
0
!
!
!
2
3
1
2
3
1
2
1
0
0
1
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
NNW
9
2.5
NNW
9
2.4
NNW
8
1.2
NNW
13
2.5
NNW
15
2.4
NNW
14
2.1
NNW
13
2
NNW
13
1.8
NNW
12
1.7
NNW
11
1.6
NW
11
1.3
NW
10
1.5
NW
12
1.5
NW
11
1.3
NW
12
1.3
NW
12
1.1
NW
11
0.7
NW
16
1.4
NW
15
1.7
NW
13
Wave Graph
Metric surfscale
Energy kJ
1126
1058
782
479
3030
2187
1520
1230
920
669
561
335
646
544
494
448
273
261
773
1011
Wind (km/h)
35
N
35
N
30
N
30
NNW
15
N
5
ENE
10
NW
15
N
10
ESE
15
NW
15
N
10
SE
15
W
15
N
5
S
10
NW
20
N
20
N
25
N
15
N
Wind State
cross
cross
cross
cross
cross
glassy
cross-on
cross
cross-off
cross-on
cross-off
cross-off
on
cross
cross
cross-on
cross
cross-off
cross
cross
High Tide
7:22PM2.13m
7:44AM2.16m
8:22PM1.92m
8:58AM2.00m
10:00PM1.81m
10:42AM1.99m
11:40PM1.88m
12:03PM2.12m
00:41AM2.05m
12:55PM2.32m
1:23AM2.24m
1:34PM2.54m
1:58AM2.44m
Low Tide
1:19AM0.95m
2:02PM1.01m
2:18AM1.13m
3:32PM1.14m
4:00AM1.22m
5:23PM1.11m
5:40AM1.12m
6:33PM0.94m
6:39AM0.94m
7:16PM0.73m
7:21AM0.73m
7:51PM0.52m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:20
7:22
7:22
7:22
7:24
7:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:43
7:42
7:39
7:38
7:37
7:35
7:34
 mm
Temp °C
20
18
20
20
19
24
23
22
27
25
26
28
26
25
28
24
22
24
23
18
Feels °C
14
13
17
17
18
22
21
20
26
22
24
27
25
22
25
21
19
21
20
17
  • Map Icons:
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  • 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 Cave Surf forecast

The above surf forecast table for Cave provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cave can be found by selecting the local surf guide option on the grey menu. Our Cave 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 (Cave) 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 Cave 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 Ericeira? If you are looking for accommodation near Cave, camping, hotels and holiday cottages in Ericeira, consider staying in Torres Vedras which is 18 km (11 miles) away. Other places in and around Ericeira where you can find information about places to rent, and car hire include Sintra which is 21 km (13 miles) away, Rio de Mouro, Cacem and Loures.

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