Surf Forecasts:
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 glassy winds.
- Most powerful swell: Saturday 12 Sep, 6PM (local time) - 7ft (2.1m), 8s period, SSE swell with 520 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 glassy as the swell arrives.
The most powerful waves expected at Bikini in the next 16 days are 2.1m 8s and forecast to arrive on Saturday (Sep 12) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Saturday (Sep 19) at 9PM.
| Wave Type | Time (-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 Powerful | 6PM (Sat 12th Sep) | 7ft (2.1m) 8s |
Table - best surf conditions forecast for Bikini over the next 16 days.
The Lowdown
Alright, let’s talk about Bikini in feet and miles per hour. It’s a slow start, but there’s a big one coming way down the line.
Right now, this weekend and into Monday, it’s garbage. Cross-onshore wind, lumpy, poor surf. The water temp is about 56°F, which is a touch warmer than normal for this time of year, but don’t bother suiting up for the waves — they’re no good.
Monday the 14th cleans up. We get a light offshore wind from the NNE in the morning, and small 2-3ft S swell at 10 seconds. It’s surfable but very ordinary. Monday afternoon goes glassy, with tiny 2ft waves. It’s a knee-high session at best.
Tuesday and Wednesday are windy and poor. Thursday the 17th turns clean again with offshore wind, but only 3ft from the SSE. Small, clean, ordinary.
Friday 18th is tiny and glassy — 1-2ft. Then Saturday the 19th through Monday the 21st is mostly flat. A real quiet, dead stretch.
Now, mark your calendar for Wednesday the 23rd of September. That’s the one. A massive, very long-period groundswell from the S hits — 13ft at 15-16 seconds. The combined energy is huge. The wind is light offshore from the north, so it’ll be clean. This is exceptional, but at 13ft with that power, it’s expert-only. Beginners, don’t even think about it. This kind of period will work best on the point and reef, as the beach might close out.
Thursday the 24th still has solid 8ft waves from the SSE, but the wind is cross-offshore and it’s less perfect. Friday the 25th drops to 5ft with clean offshore wind — still great for experienced crew. By Saturday the 26th, onshore wind and rain ruin it.
The only true standout is Wednesday the 23rd. Big, clean, and heavy.
Rusty.
Short Range ForecastMostly dry. Very mild (max 13°C on Tue morning, min 8°C on Sat afternoon). Winds decreasing (fresh winds from the S on Sat afternoon, calm by Sun night). | Days 5-7 Weather SummaryMostly dry. Very mild (max 17°C on Thu afternoon, min 7°C on Tue night). Winds decreasing (fresh winds from the SW on Tue afternoon, light winds from the SE by Wed morning). | |||||||||||||||||||
Sat 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | S 8 | SSE 8 | SSE 8 | SSE 8 | SSE 10 | S 10 | S 10 | S 9 | SSE 9 | SW 5 | S 7 | S 10 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | SSE 8 | SE 8 | S 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 566 | 427 | 384 | 271 | 160 | 98 | 70 | 63 | 26 | 96 | 243 | 520 | 355 | 271 | 154 | 94 | 64 | 24 | 9 | 25 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross | cross-off | on | cross-off | cross | on | cross-on | cross-on | cross-off | off | off | off | off | cross-on | 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 | |||||
 |  |  | | | | |  |  | | | | | | | | | | | | |
 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — |
 | 6:27 | — | — | 6:28 | — | — | 6:29 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 9 | 9 | 9 | 9 | 10 | 12 | 12 | 11 | 13 | 12 | 8 | 10 | 11 | 10 | 14 | 17 | 15 | 16 | 14 | 12 |
Feels °C | 2 | 3 | 3 | 4 | 8 | 10 | 10 | 9 | 6 | 5 | 2 | 7 | 7 | 5 | 10 | 13 | 12 | 14 | 11 | 9 |
Swell 1 Height (m) Direction Period (s) | ENE 7 | E 7 | E 7 | SSE 11 | SSE 10 | E 7 | E 7 | E 7 | ESE 8 | ESE 8 | E 8 | S 10 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | SSE 8 | ENE 6 | S 4 |
| kJ | 17 | 23 | 22 | 66 | 160 | 79 | 64 | 47 | 23 | 19 | 19 | 520 | 355 | 271 | 154 | 94 | 64 | 24 | 6 | 6 |
Swell 2 Height (m) Direction Period (s) | E 12 | E 12 | ENE 8 | — | SSE 10 | S 10 | S 10 | S 9 | SSE 9 | ENE 7 | E 7 | E 8 | E 8 | E 8 | E 9 | E 8 | E 5 | SE 8 | SE 8 | ENE 7 |
| kJ | 3 | 3 | 24 | — | 160 | 98 | 70 | 63 | 26 | 10 | 1 | 11 | 5 | 5 | 6 | 1 | 19 | 9 | 9 | 9 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | E 8 | ENE 8 | E 8 | ENE 7 | S 14 | — | — | — | — | E 12 | E 12 | E 8 | ENE 5 | S 9 | S 12 |
| kJ | — | — | — | — | — | 34 | 22 | 1 | 18 | 4 | — | — | — | — | 3 | 3 | 1 | 4 | 6 | 25 |
Wind waves Height (m) Direction Period (s) | S 8 | SSE 8 | SSE 8 | SSE 8 | ESE 7 | — | — | — | W 3 | SW 5 | S 7 | — | — | NE 4 | NNE 4 | NE 4 | NE 5 | — | — | ESE 4 |
| kJ | 566 | 427 | 384 | 271 | 114 | — | — | — | 8 | 96 | 243 | — | — | 12 | 8 | 6 | 30 | — | — | 11 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 540 | 253 | 242 | 436 | 20 | 0 | 14 | 0 | 16 | 927 | 253 | 20 | 0 | 0 | 0 | 0 | 0 | 67 | 926 | 655 |
Best forecast wave conditions in Uruguay - South | ||||||||||||||||||||
Best forecast wave conditions in Uruguay | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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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