
Surf Forecasts:
Sandy Beach surf forecast from 6 Sep 2026:
- Most powerful swell: Monday 7 Sep, 11AM (local time) - 8ft (2.4m), 12s period, ENE swell with 1,703 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 2.4m 12s and forecast to arrive on Monday (Sep 07) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 14s period and expected on Monday (Sep 07) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Mon 7th Sep) | 8ft (2.4m) 12s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, this is Rusty. Let’s take a hard look at what we’ve got for Sandy Beach over the next couple of weeks. I’ll be straight with you – the forecast is a bit of a rough one for paddle surfing.
The whole run starts off rough and stays pretty average for a long stretch. We’re looking at a solid gap of poor conditions, with the first real glimmer of something different showing up only on September 9th. But even that is marginal at best.
From the get-go on September 6th, Sunday morning, it’s a write-off. We’ve got a 7ft swell from the ENE with a 12-second period, but it’s being hammered by a 19 mph cross-onshore wind from the ENE. The combined swell energy is high, reading 1951, but with that wind it’s just lumpy, messy, and poor. The water temp is about average for this time of year. Sunday afternoon, Monday, and Tuesday are more of the same – decent swell size but always with that cross-onshore or cross wind making a mess of things. The energy values stay high, between 1889 and 2233, but it’s not surfable for a paddle board. Honestly, with that much wind and that kind of chop, this setup looks more interesting for kite surfing than traditional surfing.
Wednesday September 9th morning is the first sign of a change. The swell drops to 3ft from the SSW, with a long 14-second period. The combined energy drops to 526, which is weak. The wind is a light cross-onshore from the ESE at 6 mph. It’s still just a marginal surf forecast, with only a score of 1 out of 10. It’s not good, just less bad than everything else.
Thursday the 10th through September 16th is a long, bleak stretch. Swell hangs around from the ENE, mostly between 3ft and 5ft, but the wind never lets up. It’s a constant cross or cross-onshore breeze from the ENE or NE, with speeds picking up to 19, 22, and even 25 mph. The combined energy values stay in the moderate to weak range, from 140 up to 773, but the wind just ruins any chance of a clean wave. The swell period is short, around 7 to 8 seconds, which is just poor quality, weak windswell. Everything is labelled “poor surf conditions.” This is a proper drought.
Then from September 17th through the 21st, the swell direction swings to the SSW, with a long period of 14 to 18 seconds. The swell height is small, between 2ft and 4ft. The combined energy sits in the moderate range, from 385 to 773. But here’s the killer – the wind is still howling from the ENE and NE at 19 to 25 mph, which is cross-shore. So while that long-period groundswell from the SSW is a promising sign for points and reefs in theory, here at Sandy Beach, which is a beach and reef setup, the strong cross-shore wind just makes it lumpy and messy. It’s still labelled as poor.
The only real stand-out, and I’m using that term loosely, is that Wednesday morning on September 9th. It’s the only time the wind drops to a light breeze and the conditions aren’t a total disaster. But it’s a 3ft marginal wave. It’s not a classic day.
So, the honest truth for Sandy Beach: there’s no true standout. The best bet is to keep an eye on that Wednesday the 9th for a small window of cleaner, but still marginal, surf. After that, it’s a long wait. Conditions like this are fairly normal for the area when the trade winds lock in, so this kind of blank run isn’t unusual. Forecasts can change, so don’t lose hope entirely, but for now, it’s a tough watch.
Rusty.
Short Range ForecastHeavy rain (total 31mm), heaviest during Sun night. Warm (max 27°C on Mon afternoon, min 25°C on Sun night). Winds decreasing (fresh winds from the SSE on Mon night, light winds from the SSE by Tue night). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Wed night. Warm (max 27°C on Wed morning, min 25°C on Thu afternoon). Winds increasing (light winds from the ESE on Wed morning, fresh winds from the ENE by Thu afternoon). | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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) | ENE 12 | ENE 12 | ENE 12 | ENE 12 | ENE 12 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | SSW 13 | SSW 16 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 10 | ENE 10 | ENE 6 |
Wave Graph | |||||||||||||||||||||
1240 | 1064 | 1461 | 1703 | 1461 | 950 | 680 | 604 | 356 | 269 | 257 | 176 | 179 | 158 | 186 | 249 | 256 | 234 | 445 | 439 | 190 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross |
High Tide | 12:00PM0.71m | 00:14AM0.26m | 12:48PM0.73m | 1:03AM0.31m | 1:30PM0.72m | 1:48AM0.38m | 2:07PM0.69m | 2:29AM0.44m | 2:41PM0.65m | 3:11AM0.50m | 3:13PM0.59m | 3:51AM0.55m | 3:42PM0.51m | 4:32AM0.57m | |||||||
Low Tide | 7:41PM0.09m | 5:40AM0.04m | 8:09PM0.07m | 6:40AM0.03m | 8:36PM0.05m | 7:34AM0.03m | 9:01PM0.04m | 8:25AM0.05m | 9:26PM0.04m | 9:14AM0.08m | 9:49PM0.03m | 10:05AM0.12m | 10:11PM0.04m | ||||||||
6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | |
mm | — | 3 | 11 | 4 | 4 | 5 | 2 | — | 2 | — | — | 1 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 25 | 25 | 26 | 25 | 27 | 27 | 27 | 28 | 30 | 31 | 29 | 27 | 26 | 25 | 23 | 23 | 23 | 23 | 23 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | ENE 12 | ENE 12 | ENE 12 | SW 14 | ENE 12 | SW 13 | WSW 11 | ENE 11 | ENE 10 | ENE 8 | ENE 8 | E 12 | E 12 | E 12 | E 11 | SW 16 | SW 15 | SW 15 | SW 15 | SSW 16 | SSW 13 |
1240 | 1064 | 1461 | 1273 | 1461 | 3799 | 883 | 604 | 325 | 173 | 161 | 153 | 141 | 101 | 127 | 261 | 232 | 178 | 191 | 99 | 68 | |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SSW 12 | SSW 14 | SSW 17 | SW 14 | ENE 12 | SSW 9 | SSW 8 | SSW 8 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SW 16 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 13 | SW 16 |
374 | 517 | 1193 | 385 | 1812 | 950 | 510 | 306 | 138 | 269 | 257 | 176 | 129 | 93 | 211 | 45 | 46 | 25 | 23 | 70 | 64 | |
Swell 3 Height (m) Direction Period (s) | SSW 16 | S 19 | S 18 | SSE 8 | S 9 | SSW 15 | ENE 11 | W 10 | SSW 14 | SSW 8 | E 13 | SSW 8 | SSW 16 | SW 18 | S 12 | SW 9 | SW 8 | SW 8 | WSW 8 | SSW 11 | SE 8 |
318 | 180 | 243 | 67 | 186 | 494 | 680 | 432 | 356 | 98 | 166 | 32 | 179 | 155 | 72 | 20 | 11 | 10 | 6 | 11 | 2 | |
Wind waves Height (m) Direction Period (s) | — | ENE 12 | — | ENE 12 | SSE 8 | SSE 8 | — | — | — | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 10 | ENE 10 | ENE 6 |
— | 706 | — | 1703 | 486 | 438 | — | — | — | — | — | 147 | 172 | 158 | 186 | 249 | 256 | 234 | 445 | 439 | 190 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 47 | 47 | 23 | 114 | 42 | 62 | 30 | 5 | 5 | 5 | 16 | 16 | 16 | 16 | 16 | 20 | 47 | 47 | 18 | 47 | 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.










