Surf Forecasts:
Sandy Beach surf forecast from 4 Sep 2026:
- Most powerful swell: Monday 7 Sep, 8PM (local time) - 15ft (4.5m), 14s period, SSW swell with 8,639 kJ wave energy.
Best Forecast Surf Conditions for Sandy Beach this week:
The most powerful waves expected at Sandy Beach in the next 16 days are 4.5m 14s and forecast to arrive on Monday (Sep 07) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 11s period and expected on Tuesday (Sep 08) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Mon 7th Sep) | 15ft (4.5m) 14s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's break down what's cookin' for Sandy Beach.
First thing, I gotta be honest with ya – the next week and a half is a bit of a struggle. We're looking at a long stretch of poor to marginal conditions kicking off Thursday the 3rd and running right through to around the 12th of September. The wind is the main problem, blowing hard cross-shore from the ENE, chopping up that 7ft ENE swell (977) we have on the first day. That's ugly, messy, cross-chop, not the kind of thing you paddle out for. The water's a warm 81°, which is about average for the time of year, so at least you don't need a thick wetsuit.
The whole first week is this same story. We get a pulse of bigger swell on the 7th, with a 16ft SSW groundswell (13292) on Monday afternoon, but it's getting hammered by a strong onshore wind. That's a massive wall of whitewater, and with the wind howling, it’s just a washing machine. Honestly, for that two-day window around the 5th and 6th, with the strong cross-shore and that size, this setup might be more interesting for the kite surfers than for us paddle folks.
Things start to look a little more promising after that. The gaps of poor surf finally give way to some cleaner conditions. Now, the standout window is Monday the 14th of September. We’ve got a 8ft swell from the ENE (1149) and a light breeze that’s keeping the surface smooth. The wind is cross-on, which is not perfect, but it’s a light wind, so it'll be workable. The swell is a little short period at 8 seconds, so it won't be the most powerful thing, but it’s the cleanest we’ve seen in a while. The morning of the 14th with a 8ft ENE swell (855) and even lighter winds might be the pick of the entire run if you can get out there early.
After that, the energy drops off. There’s a weird, long-period SSW groundswell (21 seconds) showing up on the 15th, but it’s only 3ft and getting chopped up by a fresh breeze, so it’s not really a goer. The following week looks like a return to the same messy cross-shore pattern, so if you’re planning ahead, circle the 14th of September on your calendar. It’s the one true standout in this 16-day window.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun morning. Warm (max 26°C on Sat morning, min 25°C on Thu afternoon). Mainly strong winds. | Days 5-7 Weather SummaryHeavy rain (total 31mm), heaviest during Sun night. Warm (max 27°C on Mon morning, min 23°C on Sun night). Winds decreasing (strong winds from the SSE on Mon night, light winds from the E by Tue night). | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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) | ENE 7 | ENE 7 | S 13 | E 14 | E 14 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | SSW 14 | ENE 12 | SSW 15 | ENE 12 | ENE 11 | ENE 10 | SSW 14 | SSW 14 | E 13 | E 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 558 | 487 | 529 | 594 | 1807 | 1641 | 1641 | 1568 | 1240 | 1369 | 1700 | 1676 | 6963 | 1001 | 550 | 371 | 356 | 273 | 229 | 219 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross |
High Tide | 7:01PM0.22m | 9:55AM0.64m | 9:27PM0.19m | 11:03AM0.68m | 11:10PM0.21m | 12:00PM0.71m | 00:14AM0.26m | 12:48PM0.73m | 1:03AM0.31m | 1:30PM0.72m | 1:48AM0.38m | 2:07PM0.69m | 2:29AM0.44m | |||||||
Low Tide | 5:18PM0.21m | 1:39AM0.06m | 6:33PM0.16m | 3:03AM0.07m | 7:10PM0.12m | 4:28AM0.06m | 7:41PM0.09m | 5:40AM0.04m | 8:09PM0.07m | 6:40AM0.03m | 8:36PM0.05m | 7:34AM0.03m | 9:01PM0.04m | |||||||
 |  |  | | | | |  |  |  |  | | |  | | | | | | | |
 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — |
 | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — |
mm | — | — | — | — | — | — | — | — | 1 | 8 | 14 | — | 1 | 5 | 2 | — | 1 | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 25 |
Feels °C | 21 | 21 | 20 | 21 | 22 | 24 | 24 | 23 | 25 | 25 | 25 | 27 | 27 | 25 | 27 | 29 | 31 | 27 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | SSE 12 | S 13 | S 13 | S 12 | S 12 | S 12 | S 12 | SSW 12 | SSW 12 | SSW 12 | SSW 14 | SSW 15 | SSW 15 | ENE 12 | SSW 9 | ENE 10 | ENE 8 | ENE 8 | ENE 8 | E 13 |
| kJ | 187 | 339 | 529 | 594 | 469 | 547 | 661 | 718 | 656 | 608 | 1700 | 3195 | 6963 | 1001 | 482 | 290 | 177 | 142 | 128 | 219 |
Swell 2 Height (m) Direction Period (s) | S 14 | E 14 | E 14 | E 14 | N 11 | SSW 17 | NNE 10 | N 8 | SSW 16 | SSW 15 | S 18 | SSW 17 | ENE 12 | SSW 15 | ENE 11 | SSW 8 | S 8 | SSW 14 | E 13 | SSW 13 |
| kJ | 200 | 334 | 357 | 577 | 10 | 117 | 19 | 12 | 310 | 474 | 240 | 394 | 1556 | 474 | 550 | 240 | 134 | 273 | 229 | 133 |
Swell 3 Height (m) Direction Period (s) | E 12 | SW 18 | SW 12 | SW 13 | SSW 20 | NNE 10 | S 22 | N 11 | SSE 10 | SSE 10 | N 9 | S 8 | SSW 17 | E 14 | W 9 | SSW 14 | SSW 14 | E 13 | SSW 13 | S 7 |
| kJ | 145 | 12 | 6 | 27 | 37 | 20 | 9 | 9 | 19 | 34 | 2 | 116 | 465 | 148 | 194 | 371 | 356 | 229 | 204 | 28 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 14 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | ENE 12 | — | SW 11 | — | — | — | — | — | ENE 7 |
| kJ | 558 | 487 | 443 | 404 | 1807 | 1641 | 1641 | 1568 | 1240 | 1369 | 1649 | 1676 | — | 2891 | — | — | — | — | — | 167 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 59 | 55 | 59 | 110 | 47 | 47 | 55 | 47 | 47 | 16 | 17 | 42 | 108 | 126 | 5 | 3 | 5 | 20 | 48 | 47 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Sandy Beach Surf forecast
The above surf forecast table for Sandy Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sandy Beach can be found by selecting the local surf guide option on the grey menu. Our Sandy Beach 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 (Sandy Beach) 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 Sandy Beach 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.
Sandy's Beach is 15 km (9 miles) from the city of Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.
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