
Surf Forecasts:
Boulders surf forecast from 14 Sep 2026:
- Best quality surf: Thursday 17 Sep, 10AM (local time) - 6ft (1.8m), 14s period, S swell with offshore winds.
- Most powerful swell: Monday 21 Sep, 1PM (local time) - 7ft (2.2m), 15s period, SSW swell with 2,237 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 10AM (local time) - 6ft (1.8m), 14s period with S 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 Thursday (Sep 17) at 10AM. The primary swell is predicted to be 1.8m and 14s period with a secondary swell of 1.1m and 15s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Boulders in the next 16 days are 2.2m 15s and forecast to arrive on Monday (Sep 21) at 1PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 5s period and expected on Thursday (Sep 17) at 7PM.
| Wave Type | Time (+13) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Thu 17th Sep) | 6ft (1.8m) 14s |
| Best Surf | 10AM (Thu 17th Sep) | 6ft (1.8m) 14s |
| Most Powerful | 1PM (Mon 21st Sep) | 7ft (2.2m) 15s |
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 coming our way over the next couple of weeks. It’s a bit of a mixed bag, but there are some definite windows to get excited about.
The first few days are a bit average, but don't write it off just yet. There's some proper juice building for the end of the week and start of next week. That's where the real focus is.
Right now, through Tuesday the 15th and Wednesday the 16th, it’s pretty average. We've got a 5ft SW groundswell with a long 16 second period, but the wind is a problem. It's blowing a cross-shore 19 mph on Tuesday, making things lumpy. Combined swell energy is 2009 (moderate). Not the best time to paddle out at Boulders. Wednesday cleans up a bit with a cross-offshore breeze, but the swell drops to 5ft and 4ft. The water temp is sitting about average for this time of year.
Now, Thursday the 17th morning is where it starts to get interesting. The wind swings to a clean offshore from the NNE at 12 mph, and we’ve got a solid 6ft S swell with a 14 second period. Combined energy hits 1929 (moderate). This is looking like excellent surf for experienced surfers. It’s a reef break that’s consistent, so expect some proper walls. It can get a bit crowded here sometimes, so get in early. This is a standout window.
Friday the 18th and Saturday the 19th drop off in size and quality. Friday has a clean 5ft S swell but the wind goes cross-offshore. Saturday morning sees a smaller 4ft S swell with light offshore winds, but it's not the same quality. By Sunday the 20th, it goes glassy. We’ve got a 3ft SW groundswell with a 15 second period in the morning and a 3ft S swell in the afternoon. Combined energy is 652 and 696 (weak). These are small, clean waves – good for a longboard or a fun board.
The real highlight, though, looks like Monday the 21st. The wind goes glassy all day. In the morning, we’ve got a 6ft SW groundswell with a 13 second period, and combined energy of 1431 (moderate). But the afternoon is the pick: a 7ft SSW swell, 12 second period, and combined energy jumping to 2017 (moderate). This is excellent surf for experienced surfers. This is a big, clean swell at a consistent reef. This is another standout.
After that, things go downhill. From Tuesday the 22nd through the end of the month, the wind shifts to a strong cross-shore from the east, often 19 mph or more, and it gets lumpy and messy. The swell hangs around 4ft to 8ft, but it’s a washing machine out there. By the 25th and 26th, we get a short-period, wind-affected swell with a combined energy over 3400 (strong) but it's blown out. This setup looks more interesting for kite surfing than paddle surfing. The final days of September are a write-off with strong winds and poor conditions.
So to sum it up, your best bets are Thursday morning the 17th and Monday the 21st, especially the afternoon. Get out there before the wind turns ugly.
Rusty.
Short Range ForecastHeavy rain (total 38mm), heaviest during Thu afternoon. Warm (max 27°C on Wed afternoon, min 24°C on Thu afternoon). Winds decreasing (fresh winds from the ESE on Mon night, light winds from the NNW by Thu afternoon). | Days 4-6 Weather SummaryHeavy rain (total 36mm), heaviest during Sat night. Warm (max 27°C on Fri afternoon, min 24°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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 16 | SW 17 | SW 17 | SW 16 | SW 16 | S 15 | S 14 | S 14 | S 13 | S 12 | S 12 | S 12 | S 12 | S 11 | S 11 | SW 15 | S 12 | SW 16 | SW 13 | SSW 12 | SW 15 |
Wave Graph | |||||||||||||||||||||
1384 | 1579 | 1399 | 1039 | 823 | 730 | 1335 | 1162 | 888 | 771 | 485 | 472 | 319 | 235 | 184 | 335 | 294 | 560 | 1083 | 1498 | 1171 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-off | cross-off | cross-off | off | cross-on | cross-off | cross-off | cross-off | off | off | cross | cross-on | glassy | glassy | glassy | glassy | glassy | cross-on |
High Tide | 9:24AM0.94m | 9:46PM1.00m | 10:17AM0.86m | 10:38PM0.94m | 11:16AM0.80m | 11:37PM0.89m | 12:22PM0.76m | 00:39AM0.87m | 1:26PM0.76m | 1:40AM0.87m | 2:22PM0.78m | 2:32AM0.90m | 3:09PM0.81m | 3:17AM0.94m | |||||||
Low Tide | 3:24PM0.25m | 4:05AM0.26m | 4:11PM0.32m | 5:03AM0.30m | 5:06PM0.36m | 6:08AM0.33m | 6:09PM0.39m | 7:16AM0.33m | 7:15PM0.39m | 8:15AM0.32m | 8:13PM0.37m | 9:03AM0.29m | 9:01PM0.34m | ||||||||
6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — | 6:18 | — | — | 6:16 | — | — | |
— | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | |
mm | 8 | 3 | 5 | 3 | 1 | — | — | 10 | 3 | — | — | 5 | 3 | 4 | 20 | 1 | — | 5 | 3 | 1 | 3 |
Temp °C | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 24 | 26 | 26 | 27 | 27 | 27 | 27 | 25 | 26 | 26 | 26 | 27 | 27 | 27 |
Feels °C | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 29 | 27 | 29 | 29 | 31 | 30 | 29 | 31 | 31 | 31 | 32 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 17 | SW 17 | SE 6 | SW 16 | S 15 | S 14 | S 14 | S 13 | S 12 | S 12 | S 12 | S 12 | S 11 | S 11 | S 12 | S 12 | S 11 | SW 13 | SSW 12 | SW 15 |
1384 | 1579 | 1399 | 162 | 823 | 730 | 1335 | 1162 | 888 | 771 | 485 | 472 | 319 | 235 | 184 | 299 | 294 | 357 | 1083 | 1498 | 1171 | |
Swell 2 Height (m) Direction Period (s) | SSW 18 | SSW 17 | S 15 | SW 16 | SE 6 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SE 7 | SE 7 | ESE 7 | ESE 7 | SW 15 | SW 14 | SW 16 | SSE 11 | SSW 14 | SSE 6 |
318 | 367 | 465 | 1039 | 134 | 636 | 589 | 424 | 429 | 336 | 288 | 51 | 75 | 57 | 42 | 335 | 167 | 560 | 91 | 276 | 145 | |
Swell 3 Height (m) Direction Period (s) | NE 10 | NE 10 | ESE 11 | S 14 | S 13 | ESE 7 | NE 11 | NE 11 | E 8 | E 8 | SE 7 | SW 14 | SW 13 | SW 13 | SW 13 | ESE 7 | SW 17 | SW 13 | SSW 16 | SSE 11 | SSW 13 |
17 | 4 | 11 | 377 | 329 | 62 | 5 | 4 | 6 | 5 | 55 | 234 | 136 | 103 | 82 | 18 | 235 | 202 | 191 | 66 | 286 | |
Wind waves Height (m) Direction Period (s) | SE 7 | SE 7 | SE 7 | ESE 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | S 6 | SSE 6 | SSE 6 | — |
290 | 299 | 208 | 222 | — | — | — | — | — | — | — | — | — | — | — | — | — | 67 | 66 | 177 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 62 | 62 | 1140 | 62 | 62 | 96 | 0 | 584 | 0 | 16 | 62 | 0 | 0 | 26 | 16 | 0 | 0 | 0 | 0 | 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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