
Surf Forecasts:
Sandy Beach surf forecast from 15 Jul 2026:
- Most powerful swell: Sunday 19 Jul, 2AM (local time) - 6ft (1.8m), 8s period, ENE swell with 375 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 1.8m 8s and forecast to arrive on Sunday (Jul 19) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 15s period and expected on Wednesday (Jul 15) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sun 19th Jul) | 6ft (1.8m) 8s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the table for the next couple of weeks.
Right off the bat, I gotta be straight with you – this is a tough stretch. For the first ten days, basically from now through the 24th of July, the surf is just not cooperating. It’s a long, flat spell with nothing but poor conditions and choppy, lumpy cross-shore winds. You’re looking at a solid gap of about a week and a half with no real recommendations. The only real glimmer on the horizon starts to appear around the 24th of July, when things shift from "poor" to "marginal".
The best of a bad bunch – and honestly, the only thing even worth talking about as a stand-out – is Sandy Beach. This is a beach and reef setup, fairly consistent, but it’s exposed, and crowds are often around. The real potential kicks in around the 26th of July (Sunday) and into the 27th of July (Monday). We’re looking at a decent pulse of swell from the East, pushing 4 ft to 4 ft. The period stretches out to a very long 16 seconds. That’s proper groundswell energy, and when it hits a reef setup like this, it can mean some real shape. The combined energy is strong, hitting 1271 to 1359 – that’s what we want to see. The water temp is about 79°, which is normal for the time of year. The catch? The wind is still cross-shore, a fresh breeze from the ENE and NE, so it’s not going to be glassy. It’ll be lumpy, but with that much energy and that long period, the sets should have some push. Just be aware, with a period over 15 seconds, this kind of long groundswell can break a bit straight on a beach break, but Sandy Beach’s reef structure should handle it better than a pure sand bottom.
Before that, from the 24th of July (Friday) onward, you see a slight uptick to "marginal" with a score of 1 out of 10. The swell is still small, around 2 ft to 3 ft, but the period is a very long 18 seconds. The energy is moderate to strong (655 to 712). It’s an option for the die-hards, but it’s really just a warm-up for the main event on the 26th and 27th.
After the 27th, the swell drops back a bit but holds some energy through the 28th and 29th of July, with waves around 3 ft to 5 ft and periods of 11 to 13 seconds. The wind stays cross and fresh, so the quality is still "poor" on paper, but if you’re desperate, there’ll be waves to ride. The 29th of July afternoon shows a 5 ft swell from the ENE with 11 seconds – that could actually be a bit of size for an intermediate, but the onshore/cross component will make it a messy beast.
Bottom line: The first week and a half is a write-off. The best bet is Sandy Beach from the 26th of July for a few days. It’s not perfect, but it’s the only thing with real grunt on the horizon. Keep an eye on that long-period E swell.
Rusty.
Short Range ForecastSome drizzle, heaviest during Fri night. Warm (max 25°C on Wed morning, min 24°C on Thu night). Mainly fresh winds. | Days 4-6 Weather SummarySome drizzle, heaviest during Sat morning. Warm (max 25°C on Sat morning, min 24°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 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) | NE 7 | ENE 7 | SSW 16 | SSW 16 | SSW 17 | ENE 6 | ENE 6 | SSW 16 | SSW 14 | SSW 13 | SSW 14 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 14 | S 16 | S 15 | S 14 | S 14 | S 13 |
Wave Graph | |||||||||||||||||||||
118 | 64 | 314 | 175 | 195 | 145 | 103 | 196 | 149 | 141 | 210 | 375 | 314 | 298 | 167 | 142 | 321 | 271 | 329 | 302 | 273 | |
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 | cross | cross | cross | cross | cross-on | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-on |
High Tide | 4:19PM0.78m | 4:35AM0.27m | 4:58PM0.72m | 5:33AM0.31m | 5:35PM0.64m | 6:37AM0.35m | 6:10PM0.55m | 7:46AM0.40m | 6:42PM0.45m | 8:59AM0.45m | 7:13PM0.37m | 10:08AM0.51m | 7:46PM0.29m | ||||||||
Low Tide | 9:12AM-0.05m | 11:45PM0.02m | 10:02AM0.01m | 00:20AM0.02m | 10:55AM0.08m | 00:53AM0.03m | 11:55AM0.16m | 1:26AM0.03m | 1:10PM0.23m | 1:58AM0.03m | 2:57PM0.28m | 2:33AM0.04m | 5:25PM0.28m | 3:12AM0.05m | |||||||
5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | |
— | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:14 | — | |
mm | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 26 | 25 | 24 | 25 | 23 | 24 | 23 | 23 | 22 | 23 | 24 | 24 | 22 | 21 | 23 | 25 | 23 | 23 | 24 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | NE 7 | ENE 7 | SSW 16 | W 14 | W 14 | ENE 6 | W 14 | SSW 16 | SSW 14 | SSW 13 | SSW 14 | S 12 | SSW 12 | S 13 | SSW 12 | S 14 | S 16 | ENE 7 | S 14 | S 14 | ENE 7 |
118 | 64 | 314 | 203 | 203 | 145 | 144 | 196 | 147 | 141 | 210 | 112 | 87 | 85 | 45 | 142 | 321 | 111 | 329 | 302 | 131 | |
Swell 2 Height (m) Direction Period (s) | W 15 | W 15 | W 15 | SSW 16 | SSW 13 | SW 14 | SW 16 | W 14 | W 13 | WNW 13 | NNE 7 | W 12 | S 19 | S 18 | S 18 | S 16 | SW 18 | S 15 | E 13 | E 12 | S 13 |
221 | 215 | 212 | 175 | 113 | 211 | 125 | 98 | 90 | 57 | 19 | 28 | 66 | 106 | 97 | 135 | 81 | 271 | 123 | 109 | 273 | |
Swell 3 Height (m) Direction Period (s) | SW 13 | SW 14 | NNE 8 | SSW 13 | SSW 17 | W 14 | NNE 7 | SSW 12 | SW 15 | NNE 7 | WNW 13 | S 20 | W 12 | W 12 | NNE 8 | NNE 8 | E 16 | E 14 | SW 17 | E 7 | E 12 |
162 | 206 | 47 | 113 | 195 | 148 | 20 | 55 | 58 | 17 | 56 | 32 | 25 | 25 | 24 | 23 | 46 | 103 | 73 | 17 | 102 | |
Wind waves Height (m) Direction Period (s) | — | — | ENE 7 | NE 7 | ENE 6 | — | ENE 6 | ENE 7 | ENE 6 | ENE 6 | E 6 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | NE 7 | ENE 7 | NE 7 | — |
— | — | 68 | 109 | 82 | — | 103 | 150 | 149 | 119 | 123 | 375 | 314 | 298 | 167 | 121 | 150 | 79 | 117 | 106 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 42 | 47 | 49 | 48 | 47 | 47 | 48 | 19 | 47 | 55 | 47 | 47 | 47 | 16 | 16 | 47 | 16 | 47 | 55 | 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.










