Bikini Surf Break

Lat Long: 34.88° S 54.77° W

Bikini Surf Forecast and Surf Report

Issued: 2 am 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Bikini sea temperature is
13.4°C
2.0° 

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


Bikini surf forecast from 12 Sep 2026:

  • Best quality surf: Monday 14 Sep, 3AM (local time) - 2.5ft (0.8m), 10s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Sunday 13 Sep, 12AM (local time) - 7ft (2.2m), 8s period, S swell with 612 kJ wave energy.
  • Next surfable swell (1★+): Monday 14 Sep, 3AM (local time) - 2.5ft (0.8m), 10s period with SSE swell.

Best Forecast Surf Conditions for Bikini this week:

The surf forecast for Bikini over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 14) at 3AM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.9m and 7s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Bikini in the next 16 days are 2.2m 8s and forecast to arrive on Sunday (Sep 13) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Thursday (Sep 17) at 9PM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Mon 14th Sep)2.5ft (0.8m) 10s
Best Surf 3AM (Mon 14th Sep)2.5ft (0.8m) 10s
Most Powerful12AM (Sun 13th Sep)7ft (2.2m) 8s

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


The Lowdown

Alright folks, Rusty here. Let's get into it.

We’ve got a bit of a slow burner on our hands for Bikini over the next 16 days. The start of the period is pretty rough; strong cross-onshore winds from the SSE and lumpy surf are making things ugly through Saturday the 12th and Sunday the 13th. You’ll want to sit those days out.

Hold on for Monday morning, the 14th. The wind swings offshore from the NNE, cleaning things right up. The swell drops to a tiny 2 ft but that 10-second period out of the south gives it a bit of shape. You'll find clean, but very ordinary, waves with moderate combined energy (169). It’s not a standout, but it’s the first breathable air after a soupy weekend.

There’s a gap of smaller, weaker surf for most of the week, but things start to look up on Sunday afternoon, the 20th. The swell picks up to 3 ft from the SSE with a very long 12-second period. The wind is light and cross-offshore, making for clean conditions. The combined energy jumps to 256 (moderate). This is our first real highlight – a clean, lined-up wave from a solid groundswell, perfect for a point break.

The real star of the show, however, looks to be Wednesday, the 23rd. The morning starts clean with a 4 ft SSE swell and an 11-second period, with a gentle cross-offshore wind and combined energy of 409 (moderate). By the afternoon, the wind goes glassy. That’s a magic window: 4 ft of clean, glassy, long-period swell from the SSE. That's a session you'll remember. The water temperature is running about 56°, which is a touch warmer than normal for this time of year – always a bonus.

Thursday the 24th and Friday the 25th continue with good, clean 5 ft to 5 ft SSE swell, though the winds get a bit more side-off. The combined energy goes from 609 right up to 1049 (strong) by Friday afternoon, but the notes do say "marginal forecast or questionable tide conditions," so keep an eye on that. This is good, strong groundswell, but the tide might be the key. The long period (12-13 seconds) is great for point and reef breaks, but at a beach break it can make for straight walls.

After that, it fades out into small, weaker surf and onshore winds again for the final weekend.

So, if you're looking for the true standouts: Sunday afternoon, 20th September for that first clean, long-period groundswell, but Wednesday, 23rd September is the one. That glassy afternoon with 4 ft SSE swell is about as good as it gets in this forecast period. Get on it.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Sat night. Very mild (max 13°C on Mon afternoon, min 8°C on Sat afternoon). Winds decreasing (fresh winds from the S on Sat morning, light winds from the NNE by Sun night).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 18°C on Thu afternoon, min 8°C on Tue night). Wind will be generally light.

Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
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
1
1
1
1
0
0
0
0
1
1
1
1
1
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)
1.5
S
6
2.2
S
8
2.2
S
8
2
SSE
8
1.5
SSE
8
0.9
S
10
0.7
S
10
0.7
S
10
0.6
S
9
0.5
E
8
0.9
WSW
4
0.9
SSW
5
0.9
S
6
0.8
S
6
1.1
SSE
8
0.9
SSE
8
1
SE
8
0.7
SSE
8
0.5
SE
8
0.3
S
9
0.2
S
12
Wave Graph
Metric surfscale
Energy kJ
139
558
612
452
271
154
98
96
64
32
23
30
54
42
135
116
126
55
28
15
11
Wind (km/h)
30
SSE
30
S
20
S
25
SSE
15
SSE
10
ESE
10
NNE
10
ENE
5
NW
20
W
25
WSW
15
S
10
ESE
15
E
20
NE
15
NNE
15
NNE
15
NNE
5
W
10
S
15
ESE
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross
off
cross-off
cross-off
cross
cross-on
cross-on
cross
cross-off
off
off
off
off
cross
on
cross
High Tide
8:58PM0.28m
8:56AM0.34m
9:45PM0.26m
9:41AM0.34m
10:31PM0.24m
3:17AM0.19m
11:16PM0.22m
4:11AM0.19m
00:02AM0.20m
5:02AM0.19m
00:52AM0.19m
5:52AM0.19m
12:31PM0.30m
1:52AM0.18m
Low Tide
4:26PM0.01m
00:27AM0.20m
4:47AM0.12m
5:16PM0.01m
00:56AM0.19m
5:29AM0.14m
6:04PM0.01m
6:10AM0.15m
6:51PM0.02m
6:50AM0.16m
7:37PM0.03m
7:27AM0.17m
8:22PM0.05m
3:11AM0.17m
9:07PM0.06m
cloud
part cloud
light rain
part cloud
cloud
cloud
part cloud
light rain
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:43
6:41
6:39
6:39
6:37
6:35
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:27
6:28
6:29
6:30
6:30
6:30
6:31
 mm
1
1
Temp °C
11
9
9
9
9
10
12
13
11
13
14
11
11
12
10
15
18
15
17
17
13
Feels °C
5
2
4
3
4
7
9
10
8
7
8
8
8
8
5
11
14
12
16
15
11
  • 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 Bikini Surf forecast

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

Bikini is 17 km (11 miles) from the city of San Carlos. If you plan a holiday in Uruguay - South, look for hotels and other accommodation in San Carlos. San Carlos has rooms for a wide range of budgets as well as car hire and transport links.

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