
Surf Forecasts:
Boulders surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 4PM (local time) - 4.5ft (1.3m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 12 Aug, 10AM (local time) - 8ft (2.4m), 9s period, ESE swell with 900 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 4PM (local time) - 4.5ft (1.3m), 16s period with SW swell.
Best Forecast Surf Conditions for Boulders this week:
The surf forecast for Boulders over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 4PM. The primary swell is predicted to be 1.3m and 16s period with a secondary swell of 0.5m and 10s. Another secondary swell of 1.1m and 8s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Boulders in the next 16 days are 2.4m 9s and forecast to arrive on Wednesday (Aug 12) at 10AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (+13) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Tue 18th Aug) | 4.5ft (1.3m) 16s |
| Best Surf | 4PM (Tue 18th Aug) | 4.5ft (1.3m) 16s |
| Most Powerful | 10AM (Wed 12th Aug) | 8ft (2.4m) 9s |
Table - best surf conditions forecast for Boulders over the next 16 days.
The Lowdown
Right folks, Rusty here. Let’s have a look at what’s cookin’ for the next couple of weeks. It’s gonna be a bit of a mixed bag, so grab a coffee and settle in.
First up, we’re looking at Boulders. This is a reef break, so it’s got that nice shape to it, but it’s not for the faint-hearted – it’s an advanced wave. The water temp is about average for this time of year, so nothing wild there.
The overall pattern is that we’re getting a lot of cross-shore wind and messy chop for the first several days, which is a real shame. The swell is there, but the conditions are just not cooperating. It’s a bit of a frustrating start.
Wednesday the 12th and Thursday the 13th are a write-off. Strong cross-shore winds, lumpy chop, and the wave energy is moderate at best (1609 on the 12th morning, dropping to 1032 on the 13th morning). You’d be wasting your time.
We start to see a glimmer of hope on Sunday the 16th. The swell drops right down to 3ft from the SW, but the wind goes cross-offshore and the water turns clean. It’s a bit marginal, but it’s a start. The period is long, 18 seconds, which is proper groundswell. That long period stuff can be a bit tricky on a reef – it’ll look good but you’ll be waiting for the sets. The energy is still moderate (942). This is a session for the patient surfer.
Monday the 17th morning is a similar story – clean, 3ft SW swell, long period. Still marginal though.
Now, Tuesday the 18th of August is your standout. The morning is a bit average, but the afternoon session is where it’s at. You’ve got a 4ft SW swell with a 16-second period, and the wind is a gentle cross-offshore breeze. The water will be glassy clean. The wave energy is solidly moderate (977). The crowd profile says “sometimes” at Boulders, so you might have a few mates out, but it’s not going to be a zoo. If you can get out there Tuesday afternoon, that’s the one to circle on the calendar. Expect very good surf conditions.
After that, it gets messy again. The wind swings cross-onshore from Wednesday the 19th, and the swell gets bigger but rough. On Thursday the 20th, we get a 8ft SSE swell but it’s blown out by a fresh cross-onshore breeze. That’s kite-surfing territory, not for paddle surfing. The energy is getting strong (2852). There’s a big cleanup on the 22nd with a 10ft S swell, but again, cross-shore wind and chop. For the experts only, and even then, it’s not pretty.
The second week is a bit of a mess. We see a few clean-ish moments on the 23rd morning with a 6ft S swell and cross-offshore wind, but it’s still marginal. The swell direction isn’t ideal for the optimum SE direction for Boulders, so the shape might be off. The energy is moderate (1397). It’s worth a look if you’re desperate, but it’s not the standout.
From the 24th onwards, it’s back to cross-onshore wind and chop. The swell stays around 5ft to 8ft, but it’s never clean. The week looks like a washout.
So, to wrap it up: the best waves on offer are Tuesday afternoon, the 18th of August. That’s your window. The rest of the time, you’re fighting the wind. Enjoy it while it lasts.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Thu morning, min 25°C on Thu afternoon). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Sat night, min 25°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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) | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 17 | SW 16 | SW 16 | SW 16 |
Wave Graph | |||||||||||||||||||||
900 | 740 | 613 | 474 | 432 | 333 | 333 | 333 | 352 | 302 | 254 | 337 | 516 | 459 | 521 | 416 | 502 | 822 | 823 | 783 | 783 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross | cross-off | cross | cross-off | cross-off | cross-off | cross |
High Tide | 5:48AM1.26m | 6:21PM1.11m | 6:39AM1.26m | 7:11PM1.13m | 7:29AM1.23m | 8:00PM1.13m | 8:18AM1.18m | 8:48PM1.11m | 9:08AM1.10m | 9:38PM1.07m | 9:59AM1.01m | 10:29PM1.02m | 10:54AM0.92m | 11:23PM0.97m | |||||||
Low Tide | 12:13PM-0.02m | 00:22AM0.04m | 1:01PM-0.02m | 1:13AM0.05m | 1:48PM0.01m | 2:04AM0.08m | 2:34PM0.06m | 2:55AM0.14m | 3:20PM0.13m | 3:47AM0.20m | 4:07PM0.21m | 4:43AM0.26m | 4:58PM0.28m | ||||||||
6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | 6:41 | — | — | 6:41 | — | — | |
— | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:21 | — | — | 6:21 | — | — | 6:21 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 27 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 27 | 26 | 26 | 27 | 26 | 26 | 26 | 26 | 27 | 26 |
Feels °C | 22 | 23 | 24 | 25 | 26 | 24 | 25 | 25 | 23 | 26 | 24 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 28 | 30 | 27 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 12 | S 12 | S 14 | ESE 9 | ESE 9 | S 12 | S 12 | S 13 | S 12 | S 12 | S 11 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 17 | SW 16 | SW 16 | SW 16 |
518 | 420 | 282 | 253 | 432 | 333 | 180 | 134 | 219 | 98 | 138 | 118 | 516 | 459 | 521 | 416 | 502 | 822 | 823 | 783 | 783 | |
Swell 2 Height (m) Direction Period (s) | SW 18 | SW 15 | SW 16 | S 10 | S 13 | S 13 | S 15 | S 14 | SW 17 | SW 16 | SW 16 | SW 18 | S 11 | S 11 | SSE 11 | S 10 | S 10 | S 10 | S 10 | SSE 10 | S 10 |
111 | 77 | 206 | 102 | 350 | 263 | 213 | 202 | 147 | 125 | 203 | 258 | 82 | 79 | 40 | 78 | 74 | 70 | 67 | 51 | 47 | |
Swell 3 Height (m) Direction Period (s) | SW 15 | SW 18 | S 15 | SW 16 | SW 14 | S 17 | SW 13 | SW 18 | SW 13 | S 13 | SW 19 | SW 14 | SE 12 | SE 12 | S 9 | SW 11 | SW 11 | WNW 12 | SW 10 | SW 10 | SE 15 |
80 | 49 | 112 | 203 | 169 | 270 | 88 | 152 | 43 | 55 | 94 | 103 | 37 | 35 | 27 | 30 | 40 | 14 | 15 | 15 | 55 | |
Wind waves Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 9 | ESE 9 | — | — | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 5 |
900 | 740 | 613 | 474 | — | — | 333 | 333 | 352 | 302 | 254 | 337 | 307 | 212 | 202 | 207 | 197 | 180 | 180 | 128 | 72 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 577 | 577 | 577 | 62 | 62 | 105 | 105 | 577 | 577 | 62 | 62 | 62 | 577 | 584 | 62 | 105 | 62 | 105 | 62 | 0 | 62 |
Best forecast wave conditions in Upolu | |||||||||||||||||||||
Best forecast wave conditions in Samoa | |||||||||||||||||||||
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Information about the Boulders Surf forecast
The above surf forecast table for Boulders provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Boulders can be found by selecting the local surf guide option on the grey menu. Our Boulders 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 (Boulders) 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 Boulders 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.
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