The Reef Surf Break

Lat Long: 38.93° N 9.42° W

The Reef Surf Forecast and Surf Report

Issued: 6 am 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's The Reef sea temperature is
20.2°C
0.2° 

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


The Reef surf forecast from 31 Aug 2026:

  • Best quality surf: Sunday 6 Sep, 4AM (local time) - 4.5ft (1.4m), 12s period, NW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 1 Sep, 1AM (local time) - 6.5ft (2.0m), 10s period, NNW swell with 772 kJ wave energy.
  • Next surfable swell (1★+): Sunday 6 Sep, 4AM (local time) - 4.5ft (1.4m), 12s period with NW swell.

Best Forecast Surf Conditions for The Reef this week:

The surf forecast for The Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 06) at 4AM. The primary swell is predicted to be 1.4m and 12s period with a secondary swell of 0.8m and 7s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at The Reef in the next 16 days are 2.0m 10s and forecast to arrive on Tuesday (Sep 01) 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 0.2m 15s period and expected on Tuesday (Sep 01) at 10AM.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Sun 6th Sep)4.5ft (1.4m) 12s
Best Surf 4AM (Sun 6th Sep)4.5ft (1.4m) 12s
Most Powerful 1AM (Tue 1st Sep)6.5ft (2.0m) 10s

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


The Lowdown

Alright, let’s break it down. The start is a rough one, but stick with me – there’s a couple of real good ones if you wait.

Right now, The Reef is getting hammered by a fresh north wind, cross-shore, and the water’s about 68°, which is normal for this time of year. The swell is there, but the wind is ruining it. Monday the 31st through to Thursday the 3rd of September is a washout – lumpy, cross-chop, and poor surf. Not worth paddling out. The combined energy is moderate (328) but the wind is just nasty.

Friday the 4th of September morning cleans up a little with a light cross-off breeze and a clean face, but the swell is tiny at 2ft from the WNW. It’s surfable but not exciting. The energy drops to 112. If you’re really jonesing, you could get a few little ones.

Saturday the 5th of September morning has a long-period groundswell rolling in at 16 seconds from the NW, but only 2ft. The energy is moderate (310) and the wind is gentle, so it’s clean, but the size is just too small to get stoked about. The afternoon gets messy again.

Now, here’s the standout. Sunday the 6th of September morning. This is the one. The wind goes dead calm – glassy – and the swell jumps to 5ft from the NNW with a solid 12-second period. The combined energy is strong at 651. The water is clean, the waves have shape, and it’s a reef break that’s fairly consistent. This is the best session on offer. It’s a little too big for beginners, but for anyone with some experience, this is going to be a morning to remember. The afternoon swings onshore, so get it early.

After that, Monday the 7th of September morning has a clean, light offshore breeze but only 3ft from the WNW. The period is long at 14 seconds, so there’s energy, but the size is lacking. Tuesday the 8th is marginal. Wednesday the 9th of September morning is glassy again but the swell is short-period (6 seconds) and only 4ft – ordinary conditions.

The second week gets more interesting. Sunday the 13th of September morning has a light cross-off breeze and clean 4ft from the NNW. It’s not huge, but it’s rideable. Monday the 14th of September morning is glassy with 3ft from the WNW – clean, small, but fun for a longboard.

Then Tuesday the 15th of September. This is the big one. The swell hits 7ft from the NW with a 14-second period. The combined energy is massive at 1638. The wind is light and offshore from the NE. This is excellent surf, but it’s only for experienced surfers – 7ft is heavy, and The Reef is a reef break. If you’re solid, this is a serious session. The afternoon gets a bit cross-onshore, so the morning window is everything.

Crowds are likely at The Reef, especially on a Sunday or Tuesday morning with good conditions. It’s a fairly consistent spot, so it won’t be empty. The direction is NW, which is the optimum for this break, so the waves will line up nicely.

If you’re not an expert, the Sunday the 6th of September morning is your best bet – clean, glassy, 5ft, and plenty of energy. For the big dogs, Tuesday the 15th of September morning is the one to circle on the calendar. Everything else is either too small, too windy, or too messy.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 21°C on Wed morning, min 18°C on Mon night). Mainly fresh winds.

Days 4-6 Weather Summary

Some drizzle, heaviest during Sat night. Warm (max 33°C on Sat morning, min 19°C on Thu night). Wind will be generally light.

Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
AM
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
0
0
0
0
0
0
0
0
0
0
0
0
1
0
2
3
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)
1.1
NW
9
1.4
NW
10
2
NNW
10
1.8
NW
9
1.8
NNW
9
1.8
NNW
9
1.6
NNW
7
1.4
NNW
7
1.3
NNW
7
1.2
NNW
7
1
NNW
7
0.9
NNW
6
0.9
NNW
6
0.8
WNW
10
0.8
WNW
9
0.5
NW
16
1.2
NW
15
1.4
NW
13
1.5
NNW
12
1.3
NNW
11
0.9
NNW
10
Wave Graph
Metric surfscale
Energy kJ
183
384
772
528
523
486
247
173
172
128
96
55
44
122
106
132
631
679
595
372
192
Wind (km/h)
30
N
35
N
30
N
30
N
30
N
30
N
25
N
25
NNW
20
N
10
N
20
NNW
20
N
25
NNE
30
N
20
NNE
15
NNE
25
NNW
15
N
0
ENE
15
WNW
10
N
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-off
cross
cross-off
cross-off
cross
cross
glassy
on
cross-off
High Tide
5:24PM2.94m
5:46AM2.76m
6:02PM2.80m
6:25AM2.66m
6:46PM2.61m
7:12AM2.51m
7:40PM2.39m
8:13AM2.35m
8:55PM2.19m
9:37AM2.25m
10:33PM2.12m
11:12AM2.31m
00:04AM2.23m
Low Tide
11:11AM0.19m
11:35PM0.18m
11:48AM0.28m
00:12AM0.31m
12:31PM0.42m
00:55AM0.50m
1:22PM0.60m
1:49AM0.71m
2:31PM0.77m
3:05AM0.89m
4:07PM0.85m
4:44AM0.93m
5:46PM0.74m
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
clear
clear
clear
part cloud
rain showers
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:05
7:05
7:05
7:07
7:07
7:09
7:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:09
8:08
8:07
8:05
8:04
8:01
8:00
 mm
1
Temp °C
20
20
18
20
20
18
21
21
19
23
23
21
25
24
24
33
28
28
28
26
27
Feels °C
16
16
14
16
16
14
19
19
17
22
21
20
22
21
21
28
24
25
28
25
25
  • 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 The Reef Surf forecast

The above surf forecast table for The Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at The Reef can be found by selecting the local surf guide option on the grey menu. Our The Reef 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 (The Reef) 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 The Reef 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.

The Reef is 15 km (9 miles) from the city of Sintra. If you plan a holiday in Ericeira, look for hotels and other accommodation in Sintra. Sintra has rooms for a wide range of budgets as well as car hire and transport links.

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