Surf Forecasts:
Bikini surf forecast from 18 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 3AM (local time) - 3.5ft (1.0m), 10s period, SSE swell with offshore winds.
- Most powerful swell: Sunday 23 Aug, 3PM (local time) - 8ft (2.4m), 13s period, S swell with 1,892 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 12PM (local time) - 2ft (0.6m), 7s period with S 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 Wednesday (Aug 19) at 12PM. The primary swell is predicted to be 0.6m and 7s period with a secondary swell of 0.5m and 5s. 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 2.4m 13s and forecast to arrive on Sunday (Aug 23) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Monday (Aug 24) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Wed 19th Aug) | 2ft (0.6m) 7s |
| Best Surf | 3AM (Tue 25th Aug) | 3.5ft (1.0m) 10s |
| Most Powerful | 3PM (Sun 23rd Aug) | 8ft (2.4m) 13s |
Table - best surf conditions forecast for Bikini over the next 16 days.
The Lowdown
G’day, Rusty here. Well, I gotta be straight with you—this stretch of 16 days at Bikini is a real mixed bag, and honestly, mostly a bit of a struggle. We’re looking at a long, quiet start with only tiny, weak swell and cross or onshore winds, so if you’re hoping for a decent wave, you’ll be waiting a while. The water temperature sits at 53°, which is about normal for this time of year—nothing special there.
The first real pulse of energy doesn’t show up until the weekend of the 22nd of August. On Saturday morning, we’ve got a 5ft swell from the south with a period of 11 seconds, pushing a moderate 608 units of combined energy. The wind is cross-onshore from the WSW at 12 mph, so it’s gonna be choppy—not ideal. That swell builds through Sunday, with the morning bringing 7ft from the south (11 seconds, 1146 energy) and onshore winds from the SSW at 16 mph, making for lumpy, poor conditions. By Sunday afternoon, the swell hits 8ft from the south (13 seconds, 1892 energy), but it’s still cross-onshore and choppy. That’s big, powerful, long-period groundswell, but the wind is just ruining it. This is expert-only territory, and even then, it’s messy.
Monday the 24th of August offers a slight improvement. The swell drops to 5ft from the SSE (12 seconds, 720 energy) in the morning with light cross-shore wind from the ESE at 6 mph, and the afternoon cleans up with a 5ft SSE swell (11 seconds, 505 energy) and a cross-offshore breeze from the east at 12 mph. Conditions are marginal, but the afternoon session is the best window in the whole forecast—cleaner lines, but still not a standout. The swell direction is from the SSE, which is close to the optimum south for Bikini’s exposed setup, but it’s a bit off.
After that, it’s back to small, weak surf for the rest of the week and into September. Tuesday the 25th of August has a 3ft SSE swell with offshore winds from the NE at 16 mph, but it’s tiny and ordinary. The following days drop to 1ft or less, and the winds switch around—some clean, some choppy. The combined energy values are in the double digits, telling you there’s just no power. There’s a gap of several days with no real recommendations, and the final few days of the forecast show a little more swell around the 1st of September, but the wind is onshore and the conditions are poor again. Bikini is a beach and point setup that’s very consistent, but with this run of bad wind and small waves, it’s not offering much. If you’re a kite surfer, the strong southerly winds on the 21st and 31st of August might be more interesting than paddle surfing.
Nothing here is a true standout. The best bet is the Monday afternoon on the 24th of August, but even that’s just marginal. Keep an eye on the forecast—it tends not to stay this poor for long.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Thu morning. Very mild (max 11°C on Wed afternoon, min 8°C on Tue afternoon). Winds increasing (calm on Wed night, fresh winds from the S by Thu night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 10°C on Sat night, min 6°C on Sun afternoon). Winds decreasing (fresh winds from the S on Fri morning, light winds from the SE by Sun night). | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
AM | 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) | SSE 6 | SSE 6 | S 7 | S 7 | S 7 | S 7 | S 7 | SSE 7 | S 4 | S 6 | S 7 | S 7 | S 11 | S 10 | S 10 | S 11 | S 13 | S 12 | SSE 12 | SSE 11 | SSE 10 |
Wave Graph | |||||||||||||||||||||
190 | 131 | 69 | 50 | 38 | 23 | 14 | 9 | 10 | 167 | 199 | 239 | 607 | 394 | 489 | 1144 | 1892 | 1275 | 718 | 503 | 270 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross-on | cross-off | cross-off | cross | cross-on | on | on | on | on | cross-on | cross-on | cross | on | cross-on | cross-on | cross | cross-off | cross-off |
High Tide | 11:43AM0.32m | 00:37AM0.21m | 5:02AM0.19m | 12:31PM0.31m | 1:36AM0.19m | 5:52AM0.19m | 1:20PM0.30m | 2:50AM0.18m | 6:45AM0.19m | 2:12PM0.29m | 7:42AM0.19m | 3:08PM0.28m | 5:58AM0.18m | 4:07PM0.28m | 6:10AM0.18m | 5:03PM0.28m | |||||
Low Tide | 8:09PM0.03m | 3:09AM0.18m | 8:58PM0.04m | 3:45AM0.18m | 9:47PM0.06m | 4:18AM0.18m | 10:38PM0.07m | 9:43AM0.18m | 11:32PM0.07m | 6:50AM0.18m | 00:27AM0.08m | 8:42AM0.18m | 1:21AM0.08m | ||||||||
7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:11 | — | — | 7:11 | — | — | 7:09 | — | — | 7:09 | — | — | |
— | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — | — | 6:13 | — | — | 6:14 | — | |
mm | — | — | — | — | — | — | 4 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 9 | 9 | 8 | 9 | 11 | 11 | 10 | 11 | 11 | 8 | 8 | 9 | 8 | 9 | 10 | 9 | 8 | 6 | 7 | 8 | 8 |
Feels °C | 3 | 6 | 5 | 6 | 8 | 8 | 8 | 9 | 7 | 0 | 0 | 3 | 3 | 3 | 6 | 3 | 2 | 2 | 2 | 3 | 3 |
Swell 1 Height (m) Direction Period (s) | ENE 9 | SSE 6 | S 7 | S 7 | S 7 | S 7 | S 7 | SSE 7 | E 4 | E 6 | E 7 | E 7 | E 7 | S 10 | E 8 | E 10 | NE 10 | S 12 | SSE 12 | SSE 11 | SSE 10 |
29 | 131 | 69 | 50 | 38 | 23 | 14 | 9 | 4 | 6 | 8 | 4 | 1 | 394 | 1 | 2 | 4 | 1275 | 718 | 503 | 270 | |
Swell 2 Height (m) Direction Period (s) | — | ENE 9 | ESE 6 | E 5 | E 6 | E 8 | E 5 | SSW 6 | ENE 8 | — | — | — | — | E 8 | — | — | — | — | E 9 | E 9 | — |
— | 28 | 26 | 15 | 15 | 22 | 5 | 4 | 6 | — | — | — | — | 1 | — | — | — | — | 2 | 2 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | ENE 9 | ENE 9 | SE 14 | SE 13 | ENE 8 | ENE 8 | E 12 | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | 15 | 7 | 7 | 7 | 7 | 7 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSE 6 | — | — | — | — | — | — | ESE 2 | S 4 | S 6 | S 7 | S 7 | S 11 | WSW 4 | S 10 | S 11 | S 13 | — | — | — | NE 4 |
190 | — | — | — | — | — | — | 1 | 10 | 167 | 199 | 239 | 607 | 29 | 489 | 1144 | 1892 | — | — | — | 11 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 424 | 427 | 266 | 288 | 0 | 0 | 146 | 947 | 675 | 907 | 1043 | 242 | 147 | 147 | 2 | 540 | 540 | 150 | 20 | 60 | 20 |
Best forecast wave conditions in Uruguay - South | |||||||||||||||||||||
Best forecast wave conditions in Uruguay | |||||||||||||||||||||
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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.











