
Surf Forecasts:
Bikini surf forecast from 15 Sep 2026:
- Best quality surf: Thursday 17 Sep, 12AM (local time) - 4ft (1.2m), 9s period, SSE swell with offshore winds.
- Most powerful swell: Wednesday 16 Sep, 12PM (local time) - 4.5ft (1.3m), 9s period, S swell with 295 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 12AM (local time) - 4ft (1.2m), 9s 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 Thursday (Sep 17) at 12AM. The primary swell is predicted to be 1.2m and 9s period with a secondary swell of 0.1m and 8s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Bikini in the next 16 days are 1.3m 9s and forecast to arrive on Wednesday (Sep 16) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 7s period and expected on Saturday (Sep 19) at 6PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Thu 17th Sep) | 4ft (1.2m) 9s |
| Best Surf | 12AM (Thu 17th Sep) | 4ft (1.2m) 9s |
| Most Powerful | 12PM (Wed 16th Sep) | 4.5ft (1.3m) 9s |
Table - best surf conditions forecast for Bikini over the next 16 days.
The Lowdown
Morning, surfers. Rusty here, checking in on the long-range forecast for our stretch of coast. I’m not going to lie to you, the first week and a half is going to test your soul. We’ve got a lot of small, wind-whipped slop to get through before things finally turn on. But don’t hang up your board shorts yet, because there’s a light at the end of the tunnel, and it’s looking like a proper session.
The overall pattern is pretty bleak for the first nine days. We’re looking at a lot of weak, short-period swell with poor winds. The waves that do show up are going to be small and messy, with a constant cross-chop. It’s the kind of stretch where you’re better off checking your dings or doing literally anything else. We’re talking days of nothing over 4ft and most of it in the 1ft to 2ft range. There’s no punch, no power, and the wind is just going to chop it all up.
The first real glimmer of hope comes on Sunday the 20th. The morning shows the swell bumping up to 5ft from the east with a short 7-second period. The wind is a clean cross-offshore, which is a major plus, and the energy reading is up to 222. It’s not the cleanest or most powerful swell we’ll see, but after a week of junk, clean 5ft waves will feel like a party. The afternoon backs off a bit to 4ft. It’s a start.
Then we hit another flat, grovelly patch. The energy drops out, and the wind goes onshore again. It’s a frustrating yo-yo. Monday the 21st is poor with onshore wind. Tuesday the 22nd is back to small, choppy junk. But then Wednesday the 23rd morning offers a little more hope, with 3ft of south swell at an 11-second period, clean under a cross-offshore breeze. Again, not big, but clean and with a longer period is a better sign of things to come.
The real standout, the one you’ve been waiting for, is Monday the 28th of September. That morning, the stars finally align. We see a solid 6ft of south swell wrapping in, and the energy reading jumps to 521, which is strong and powerful for our coast. The period is a decent 9 seconds, and the wind is light offshore from the east, leaving the surface glassy. This is a proper surf day. The fetch and direction are working. This is the one to circle on the calendar. The afternoon before, on Sunday the 27th, gets big and messy, so that’s not the call.
The period energy carries into the next morning, Tuesday the 29th, but the conditions start to deteriorate with a strong breeze and a shorter period. Still, the direction is more southeasterly, which might offer a different look. But the standout remains Monday the 28th.
For the best of it, we’re talking about Bikini (Bikini). It’s a beach and point setup that loves this south swell direction. On Monday morning the 28th, it’s going to be solid at 6ft from the south. The swell direction is spot on for this spot. The light offshore wind will have it looking clean and lined up. It’s an advanced wave, so the bigger size will keep the crowds a bit more manageable, though they can still be likely out there when it’s good. This is the pick of the entire window.
For the beginners out there, this is not your day. On the 28th, that 6ft is way over the comfort zone. And later that afternoon the wind swings cross and it’ll chop up fast.
Also, keep a note for Sunday the 20th. While smaller, the morning session at Bikini could be a fun, clean one for a wider range of skills at 5ft from the east. It’s a shorter period, so it might be a bit lumpy, but the clean conditions will make it more user-friendly.
Water temp is about average for this time of year, so a summer wetsuit is the call.
So, there you have it. A whole lot of nothing to start, then a fantastic window right at the end. Don’t burn yourself out chasing the small stuff. Save your energy for Monday the 28th. That’s the one.
Rusty, out.
Short Range ForecastMostly dry. Very mild (max 17°C on Thu afternoon, min 7°C on Tue night). Winds increasing (light winds from the N on Mon night, fresh winds from the SSW by Tue afternoon). | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Fri afternoon, min 12°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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 9 | S 9 | SW 5 | S 7 | S 9 | S 10 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | S 13 | S 12 | S 11 | S 10 | S 10 | E 7 | E 8 | E 10 |
Wave Graph | |||||||||||||||||||
63 | 25 | 66 | 233 | 262 | 262 | 237 | 146 | 92 | 58 | 40 | 14 | 11 | 9 | 8 | 19 | 215 | 169 | 242 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | on | on | cross-on | cross-on | off | off | off | off | off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 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 | 6:39AM0.19m | 1:15PM0.28m | 7:21AM0.19m | 2:05PM0.27m | |||||
Low Tide | 1:32AM0.18m | 6:10AM0.15m | 6:51PM0.02m | 6:50AM0.16m | 7:37PM0.03m | 7:27AM0.17m | 8:22PM0.05m | 3:11AM0.17m | 9:07PM0.06m | 3:29AM0.17m | 9:55PM0.08m | 9:17AM0.19m | 10:45PM0.09m | ||||||
— | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | |
6:29 | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:32 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 10 | 13 | 10 | 9 | 8 | 10 | 9 | 14 | 17 | 15 | 16 | 18 | 13 | 18 | 18 | 15 | 17 | 17 | 15 |
Feels °C | 7 | 6 | 3 | 2 | 5 | 7 | 4 | 11 | 14 | 12 | 13 | 14 | 9 | 16 | 15 | 13 | 16 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | S 9 | ESE 8 | ESE 8 | E 8 | S 9 | S 10 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | SSE 8 | S 12 | S 11 | S 10 | S 10 | S 9 | E 8 | E 10 |
63 | 20 | 20 | 11 | 262 | 262 | 237 | 146 | 92 | 58 | 40 | 14 | 11 | 9 | 8 | 19 | 7 | 169 | 242 | |
Swell 2 Height (m) Direction Period (s) | E 7 | S 9 | ENE 6 | E 7 | SSE 11 | E 8 | E 8 | E 8 | E 8 | E 8 | E 7 | S 13 | SE 9 | SE 8 | S 12 | — | — | S 9 | S 9 |
39 | 25 | 4 | 4 | 25 | 5 | 1 | 1 | 1 | 1 | 1 | 13 | 3 | 3 | 3 | — | — | 6 | 6 | |
Swell 3 Height (m) Direction Period (s) | E 9 | ENE 7 | S 15 | — | E 8 | — | — | E 12 | E 12 | E 12 | S 13 | S 13 | E 11 | — | S 8 | — | — | — | S 12 |
2 | 9 | 4 | — | 5 | — | — | 3 | 3 | 3 | 3 | 13 | 2 | — | 1 | — | — | — | 3 | |
Wind waves Height (m) Direction Period (s) | — | W 4 | SW 5 | S 7 | — | — | NE 3 | NNE 4 | NE 4 | E 4 | ENE 4 | E 4 | ENE 5 | ENE 6 | ENE 6 | ENE 7 | E 7 | — | — |
— | 19 | 66 | 233 | — | — | 7 | 5 | 2 | 9 | 3 | 14 | 51 | 53 | 89 | 186 | 215 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 62 | 173 | 253 | 62 | 103 | 0 | 0 | 0 | 0 | 0 | 926 | 926 | 926 | 926 | 288 | 0 | 0 | 0 |
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.










