Surf Forecasts:
Boulders surf forecast from 20 Aug 2026:
- Most powerful swell: Saturday 22 Aug, 4PM (local time) - 6.5ft (2.0m), 15s period, S swell with 1,830 kJ wave energy.
Best Forecast Surf Conditions for Boulders this week:
The most powerful waves expected at Boulders in the next 16 days are 2.0m 15s and forecast to arrive on Saturday (Aug 22) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (+13) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Sat 22nd Aug) | 6.5ft (2.0m) 15s |
Table - best surf conditions forecast for Boulders over the next 16 days.
The Lowdown
Right, Rusty here. Let's have a look at what's on offer for the next couple of weeks.
Well, I gotta be straight with you, the outlook for the next little while is a bit of a tough one. Looking at the chart, the first decent chance we see doesn't pop up until the 28th of August, and even then it's a bit marginal. Before that, it's a write-off. From the 20th right through the 27th, we've got a solid run of poor surf conditions. The wind is just relentless, hammering in from the SE and ESE as a cross-onshore, making a mess of things. The swell is there, with some moderate energy readings (around 1200 to 1525), but it's being trashed by the wind. The water temperature is sitting at 81°, which is pretty normal for this time of year, so at least that's comfortable.
Now, after that long gap, we start to see something on the 28th of August. The only spot really in the conversation is Boulders (reef). It's a consistent, advanced-level reef break that's fairly exposed to the swell. The optimum swell direction here is SE.
Thursday, 28th August is when things get interesting, but it's still not great. The swell is from the SE at 7ft, with a period of 9 seconds, and a moderate cross-shore wind. The combined energy is moderate (1599). It's a "marginal" call, so don't expect perfection. The afternoon improves a little, with the swell bumping up to 10ft from the SE (10 seconds), and the energy climbing to a strong 2583. Winds are still cross-shore, so it'll be lumpy and a bit of a battle.
The real standout, though, is Saturday, 29th of August. This is the one to circle. The morning should see a clean 10ft of swell from the ESE, with a period of 10 seconds. The wind swings to a light cross-offshore (ENE) at 9 mph, which is a huge positive. The combined energy is strong (1988). This is the best window in the entire 16-day forecast. The afternoon is similar, with a touch less energy (1781) but still clean. This is a proper session for experienced surfers, as 10ft is expert territory. The crowd situation at Boulders is "sometimes", so you might have a few others on it, but it's not a zoo.
After that, the conditions start to slide again. The 30th and 31st of August see the swell dropping back to 7ft and 6ft, but the wind turns cross or cross-on again, and the quality goes back to poor. Into the first week of September, the swell gets bigger, with 12ft on the 2nd and 3rd of September, but the cross-onshore wind from the SE and ESE is back, making it a messy, lumpy mess. The combined energy readings are huge (over 2500, hitting 3984), but with that wind, it's a washing machine. For a reef break, that's just not clean. It's a shame, because the swell is there, but the wind is the enemy.
So, bottom line: hold out for the 29th of August. That's your best shot. The rest is either blown out or marginal.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Thu morning. Warm (max 25°C on Thu morning, min 24°C on Fri night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Sun night. Warm (max 26°C on Tue morning, min 24°C on Sun morning). Mainly strong winds. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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) | SW 14 | SW 14 | S 13 | S 12 | S 12 | S 12 | S 12 | S 15 | S 14 | S 13 | SE 8 | S 17 | S 16 | S 16 | S 14 | SE 8 | SE 8 | S 12 | SE 8 | SE 8 | SW 16 |
Wave Graph | |||||||||||||||||||||
920 | 890 | 673 | 855 | 657 | 574 | 698 | 1830 | 938 | 643 | 575 | 470 | 507 | 822 | 635 | 478 | 418 | 409 | 299 | 289 | 322 | |
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-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-on |
High Tide | 12:57PM0.80m | 1:21AM0.90m | 2:00PM0.78m | 2:17AM0.90m | 2:55PM0.79m | 3:08AM0.92m | 3:42PM0.81m | 3:52AM0.96m | 4:23PM0.85m | 4:32AM0.99m | 5:01PM0.89m | 5:10AM1.03m | 5:36PM0.93m | ||||||||
Low Tide | 6:53PM0.36m | 7:56AM0.33m | 7:54PM0.37m | 8:53AM0.31m | 8:48PM0.35m | 9:41AM0.28m | 9:35PM0.32m | 10:21AM0.24m | 10:16PM0.28m | 10:57AM0.21m | 10:54PM0.25m | 11:31AM0.18m | 11:31PM0.22m | ||||||||
6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — | |
— | 6:21 | — | — | 6:21 | — | — | 6:21 | — | — | 6:21 | — | — | 6:21 | — | — | 6:21 | — | — | 6:21 | — | |
mm | 2 | 1 | — | 1 | — | 3 | 2 | — | 1 | — | — | 2 | — | — | 3 | — | 2 | 3 | — | — | 9 |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 26 |
Feels °C | 24 | 23 | 23 | 22 | 22 | 22 | 21 | 21 | 20 | 20 | 23 | 21 | 22 | 22 | 22 | 24 | 23 | 25 | 25 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | S 13 | S 12 | S 12 | S 12 | S 12 | S 15 | S 14 | S 13 | SW 14 | S 10 | S 16 | S 16 | S 14 | S 13 | S 13 | S 12 | SE 8 | SE 8 | SSE 9 |
920 | 890 | 673 | 855 | 657 | 574 | 698 | 1830 | 938 | 643 | 149 | 252 | 507 | 822 | 635 | 411 | 324 | 409 | 299 | 289 | 216 | |
Swell 2 Height (m) Direction Period (s) | S 15 | S 15 | SW 12 | SW 14 | SW 14 | SW 13 | SSW 16 | SW 16 | SW 15 | SW 14 | S 18 | S 17 | S 9 | SW 14 | SW 13 | SW 13 | SW 19 | SW 17 | S 12 | S 11 | ESE 8 |
161 | 287 | 259 | 293 | 221 | 138 | 421 | 302 | 258 | 167 | 230 | 470 | 85 | 91 | 88 | 25 | 54 | 106 | 175 | 114 | 167 | |
Swell 3 Height (m) Direction Period (s) | E 8 | S 13 | SW 15 | SSE 14 | SE 13 | S 17 | SW 16 | SSE 12 | SE 13 | SSW 18 | SSE 12 | SW 13 | SW 14 | SSE 10 | — | SW 19 | SW 12 | SSE 16 | SW 18 | SW 17 | SW 16 |
44 | 123 | 171 | 121 | 83 | 215 | 211 | 58 | 43 | 110 | 29 | 144 | 89 | 32 | — | 57 | 24 | 25 | 154 | 190 | 322 | |
Wind waves Height (m) Direction Period (s) | SSE 6 | SE 6 | SE 6 | ESE 6 | ESE 7 | SE 6 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | SE 8 | ESE 7 | ESE 7 | ESE 8 | ESE 7 | SE 8 | SE 8 | ESE 8 | — | — | — |
93 | 137 | 256 | 203 | 261 | 263 | 195 | 157 | 297 | 281 | 575 | 344 | 362 | 372 | 362 | 478 | 418 | 253 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1506 | 1506 | 1245 | 2204 | 1251 | 1245 | 1245 | 1194 | 1140 | 1251 | 1251 | 1245 | 1245 | 1245 | 2511 | 1194 | 1194 | 1251 | 62 | 62 | 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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