The Reef Surf Break

Lat Long: 38.93° N 9.42° W

The Reef Surf Forecast and Surf Report

Issued: 12 am 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's The Reef sea temperature is
20.0° C
0.7° 

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 19 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 1AM (local time) - 1.5ft (0.5m), 9s period, WNW swell with glassy winds.
  • Most powerful swell: Friday 21 Aug, 1PM (local time) - 7ft (2.2m), 10s period, NNW swell with 1,020 kJ wave energy.
  • Next surfable swell (1★+): Thursday 20 Aug, 1AM (local time) - 1.5ft (0.5m), 9s period with WNW 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 Thursday (Aug 20) at 1AM. The primary swell is predicted to be 0.5m and 9s period with a secondary swell of 0.7m and 6s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at The Reef in the next 16 days are 2.2m 10s and forecast to arrive on Friday (Aug 21) at 1PM. 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 Thursday (Aug 20) at 10PM.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Thu 20th Aug)1.5ft (0.5m) 9s
Best Surf 1AM (Thu 20th Aug)1.5ft (0.5m) 9s
Most Powerful 1PM (Fri 21st Aug)7ft (2.2m) 10s

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


The Lowdown

Alright, Rusty here. Let’s have a look at what’s coming our way for The Reef over the next couple of weeks.

Right off the bat, I gotta be straight with you – the first week is a bit of a grind. We’ve got a pulse of swell, but the wind is just never playing ball. The Reef is exposed to the NW, and that’s exactly where the wind is coming from for most of this period. It’s a real shame because there’s some decent size in the water.

Starting Wednesday, August 19th, it’s small and messy. Thursday the 20th is more of the same, just weak. Friday the 21st through to Monday the 24th, we see a solid rise in swell, with waves hitting 6.6 ft to 7.9 ft from the NNW. That’s a nice size for The Reef, but the wind is a fresh cross or cross-onshore breeze, making it lumpy and choppy. The combined energy is moderate to strong (689 to 894), but the quality is just poor. This setup looks more interesting for kite surfing than paddle surfing, to be honest.

We get a bit of a lull Tuesday the 25th and Wednesday the 26th, with the swell dropping back under 3.3 ft, and the energy is weak (86 and 60). Still not clean.

Now, things start to get interesting towards the end of the month. Thursday, August 27th afternoon brings a bigger pulse, 7.5 ft from the NW with a period bumping up to 11 seconds. The combined energy jumps to 1285, which is strong. But that cross-wind is still there, lumping it up. It’s a marginal call.

Friday, August 28th morning is similar – 6.6 ft, NNW, but still a cross-wind.

The real standout, the one you want to circle on your calendar, is Monday, September 1st. We’ve got a powerful groundswell arriving. The morning shows 8.2 ft from the NNW with a period of 12 seconds, and the energy is a massive 2205. The afternoon pushes even bigger to 9.8 ft. This is serious, expert-only territory – over 8.2 ft, you need to know what you’re doing. The period is long, so it’ll be better shaped and have more power, but that long period can make it break a bit straight at a reef. The downside? The wind is still a fresh cross-shore, keeping it lumpy. It’s a marginal call, but the raw power is undeniable.

But the best of the best? That’s Wednesday, September 2nd morning. The swell drops back to a still-juicy 6.6 ft from the NNW with an 11-second period and strong energy (922). But the wind switches to a light cross-offshore from the NNE. That’s clean, glassy conditions. For the first time in the whole forecast, The Reef will be looking absolutely perfect. The score is the highest of the run, and it’s the only time we get that clean wind. That’s your session. Make it happen.

After that, the swell drops off and the wind goes back onshore, so don’t sleep on the 2nd.

Short Range Forecast

Mostly dry. Warm (max 22°C on Wed morning, min 18°C on Thu night). Winds increasing (calm on Wed night, fresh winds from the NNW by Fri afternoon).

Days 4-6 Weather Summary

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

Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
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
1
0
0
0
0
0
0
0
0
0
0
0
0
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
NNW
7
0.9
NNW
7
0.5
WNW
9
0.6
WNW
9
0.6
WNW
9
1.7
NNW
7
2
NNW
8
2.2
NNW
10
2.3
NNW
8
2.4
NNW
8
2
NNW
9
2.3
NNW
8
2.4
NNW
9
2.2
NNW
9
2.3
NNW
8
2.1
NNW
8
1.6
NNW
7
1.2
NNW
7
0.9
NNW
7
0.8
NNW
7
0.7
NW
6
Wave Graph
Metric surfscale
Energy kJ
94
68
50
62
61
310
447
961
607
801
637
705
887
725
731
592
280
124
79
51
43
Wind (km/h)
10
SSW
15
W
5
NW
10
NW
30
NNW
30
NNW
35
N
35
NNW
30
NNW
30
NNW
30
NNW
30
NW
20
NW
30
NW
30
NNW
25
NW
20
NW
15
N
15
N
15
NW
10
NW
Wind State
cross-on
on
glassy
cross-on
cross-on
cross
cross
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross-on
High Tide
7:44AM2.32m
8:08PM2.18m
8:37AM2.15m
9:12PM1.98m
9:50AM2.03m
10:42PM1.88m
11:22AM2.03m
00:11AM1.94m
12:36PM2.16m
1:11AM2.08m
1:28PM2.34m
1:54AM2.25m
2:08PM2.54m
2:30AM2.42m
Low Tide
1:50PM0.80m
2:12AM0.91m
2:50PM1.00m
3:15AM1.09m
4:18PM1.11m
4:48AM1.16m
5:56PM1.07m
6:14AM1.07m
7:03PM0.92m
7:12AM0.91m
7:48PM0.74m
7:53AM0.72m
8:24PM0.55m
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
cloud
part cloud
part cloud
clear
part cloud
clear
clear
clear
cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:54
6:56
6:56
6:56
6:58
6:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:27
8:25
8:24
8:22
8:22
8:20
8:19
 mm
Temp °C
22
22
20
22
21
19
19
20
18
20
20
19
21
20
20
20
21
19
20
20
19
Feels °C
23
22
21
21
19
14
14
15
13
16
16
15
18
16
16
17
19
17
19
19
18
  • 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 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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