
Surf Forecasts:
Boulders surf forecast from 11 Sep 2026:
- Best quality surf: Thursday 17 Sep, 1PM (local time) - 3.5ft (1.1m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 14 Sep, 7AM (local time) - 8ft (2.5m), 18s period, SSW swell with 3,903 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 4AM (local time) - 3ft (0.9m), 12s 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 Saturday (Sep 12) at 4AM. The primary swell is predicted to be 0.9m and 12s period with a secondary swell of 0.8m and 8s. 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 2.5m 18s and forecast to arrive on Monday (Sep 14) at 7AM. 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 6s period and expected on Thursday (Sep 17) at 4AM.
| Wave Type | Time (+13) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Sat 12th Sep) | 3ft (0.9m) 12s |
| Best Surf | 1PM (Thu 17th Sep) | 3.5ft (1.1m) 15s |
| Most Powerful | 7AM (Mon 14th Sep) | 8ft (2.5m) 18s |
Table - best surf conditions forecast for Boulders over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's on the cards for the next couple of weeks.
We've got one spot that's our focus: Boulders. It's a consistent reef break that's fairly exposed to the swell, so it'll be working a lot of the time, but the conditions are going to be a real mixed bag.
Right now, we're looking at a few days of poor conditions to start. The first real chance of something decent comes up on Saturday the 12th. The morning session is the pick, with clean conditions and a gentle cross-offshore breeze tidying things up. We've got a modest 3ft SW swell with a period of 11 seconds, giving the waves a bit of shape. The combined swell energy is moderate (415), so nothing too crazy. The water's a beautiful 81°, which is pretty much bang on average for this time of year, so no complaints there.
After that, the Monday the 14th kicks off a run of bigger, cleaner swell, but it's a bit of a double-edged sword. We get some solid 5ft to 5.3ft SW swell, with the period stretching out to a nice 16 to 17 seconds – that's proper groundswell. The energy ramps up strong, peaking at over 3000 on Monday (3008). The problem is, the wind is going to be a nuisance for most of that week, making it choppy and messy. However, from Tuesday the 15th through to Thursday the 17th, we see a shift to a cross-offshore breeze, which will keep the waves clean. These waves are getting into the 5.3ft to 7.2ft range, so it's really for the more experienced crew – beginners will find it a handful. The long period (15-17 seconds) means the sets will be powerful and spaced out, which Boulders, being a reef, should handle beautifully.
The standout session, and the one I'd be circling on the calendar, is Tuesday the 15th both morning and afternoon. You've got a solid 5.3ft SW swell packing a punch (1906 combined energy) and that lovely cross-offshore wind. The waves should be clean, powerful, and holding shape. It's a solid choice. A close second is Wednesday the 16th morning, with a similar 5ft SW swell and the same clean wind.
Unfortunately, from Friday the 18th onward, things go downhill with poor surf quality and onshore winds returning. There's a long gap of poor conditions that runs right through to the end of the forecast window, so that window from the 12th to the 17th is where you want to be.
Short Range ForecastModerate rain (total 13mm), heaviest on Sun night. Warm (max 27°C on Fri night, min 25°C on Sun night). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 24mm), heaviest during Mon morning. Warm (max 27°C on Tue afternoon, min 25°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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 13 | SW 12 | SW 11 | SW 18 | SW 22 | SW 20 | SW 19 | SW 18 | SSW 17 | SW 17 | SSW 16 | SW 16 | SW 17 | SW 17 | SSW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 |
Wave Graph | |||||||||||||||||||||
384 | 331 | 244 | 202 | 197 | 255 | 761 | 1593 | 1947 | 3734 | 2590 | 2008 | 1384 | 1907 | 1697 | 1338 | 1001 | 803 | 589 | 479 | 429 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-off | cross | cross | cross-off | cross-off | cross | cross | cross-off | cross-on |
High Tide | 6:46PM1.15m | 7:05AM1.16m | 7:30PM1.14m | 7:50AM1.10m | 8:13PM1.11m | 8:36AM1.02m | 8:58PM1.06m | 9:24AM0.94m | 9:46PM1.00m | 10:17AM0.86m | 10:38PM0.94m | 11:16AM0.80m | 11:37PM0.89m | ||||||||
Low Tide | 12:35PM0.03m | 00:53AM0.07m | 1:17PM0.07m | 1:39AM0.10m | 1:58PM0.12m | 2:26AM0.15m | 2:40PM0.19m | 3:14AM0.20m | 3:24PM0.25m | 4:05AM0.26m | 4:11PM0.32m | 5:03AM0.30m | 5:06PM0.36m | ||||||||
6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | |
— | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | |
mm | — | — | — | — | — | 2 | 2 | 1 | 8 | 5 | 5 | 8 | 3 | 2 | 1 | — | — | — | 2 | 1 | 5 |
Temp °C | 26 | 26 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 26 | 26 | 30 | 29 | 29 | 27 | 27 | 26 | 26 | 26 | 27 | 27 | 26 | 28 | 28 | 26 | 28 | 28 | 30 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 12 | SW 11 | SW 11 | SW 10 | SW 20 | SW 19 | SW 18 | SSW 17 | SW 17 | SSW 16 | SW 16 | SW 17 | SW 17 | SSW 16 | SW 16 | SW 16 | S 14 | S 13 | S 13 |
384 | 331 | 244 | 202 | 140 | 100 | 761 | 1593 | 1947 | 3734 | 2590 | 2008 | 1384 | 1907 | 1697 | 1338 | 1001 | 803 | 474 | 434 | 339 | |
Swell 2 Height (m) Direction Period (s) | SE 7 | SW 20 | SW 19 | E 8 | E 8 | SW 18 | SW 16 | SW 12 | ENE 8 | NE 11 | ENE 11 | S 19 | SSW 18 | SSW 16 | SSW 15 | S 14 | S 13 | S 15 | SW 15 | SW 15 | SW 15 |
12 | 102 | 184 | 82 | 63 | 255 | 216 | 137 | 11 | 20 | 12 | 182 | 413 | 454 | 481 | 383 | 350 | 459 | 589 | 479 | 429 | |
Swell 3 Height (m) Direction Period (s) | SW 21 | ENE 11 | SE 8 | SW 18 | SW 18 | SW 22 | SW 12 | SSW 9 | NE 12 | S 22 | S 21 | SE 8 | ENE 10 | NE 10 | SSE 12 | SSE 12 | SE 6 | SSE 6 | E 9 | SSE 18 | SE 7 |
71 | 11 | 29 | 117 | 197 | 227 | 141 | 25 | 23 | 9 | 36 | 14 | 10 | 4 | 13 | 13 | 61 | 44 | 25 | 67 | 55 | |
Wind waves Height (m) Direction Period (s) | E 8 | ESE 8 | E 8 | — | — | E 8 | ESE 8 | ESE 8 | S 11 | ESE 8 | ESE 5 | ENE 6 | ESE 6 | E 6 | E 6 | E 6 | — | E 10 | SE 6 | SE 6 | — |
88 | 112 | 86 | — | — | 60 | 89 | 85 | 575 | 12 | 56 | 23 | 99 | 62 | 49 | 31 | — | 67 | 72 | 64 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 577 | 62 | 62 | 0 | 62 | 62 | 866 | 866 | 866 | 133 | 105 | 133 | 105 | 62 | 62 | 62 | 62 | 62 | 96 | 62 | 0 |
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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