Surf Forecasts:
Kalapaki Beach surf forecast from 30 Aug 2026:
- Most powerful swell: Wednesday 2 Sep, 8AM (local time) - 3.5ft (1.0m), 16s period, S swell with 548 kJ wave energy.
Best Forecast Surf Conditions for Kalapaki Beach this week:
The most powerful waves expected at Kalapaki Beach in the next 16 days are 1.0m 16s and forecast to arrive on Wednesday (Sep 02) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Wed 2nd Sep) | 3.5ft (1.0m) 16s |
Table - best surf conditions forecast for Kalapaki Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about this stretch of waves.
Right off the bat, I gotta be straight with you: it’s a tough run for Kalapaki Beach. The whole 16-day window is looking pretty grim. For the first week and a half, the wind is howling out of the east-northeast at a solid 16 mph, blowing straight across or onshore, and it’s chopping everything up. The wave comment keeps saying "poor surf conditions" and the scores back that up – there’s just no quality on offer. You’re looking at a real dry spell.
The only tiny glimmer of hope, and I mean tiny, shows up on the morning of Wednesday, September 2nd. We get a long-period groundswell from the south, 16 seconds, pushing about 3ft. The combined energy still feels moderate (921), but the problem is the wind is still cross-shore at 16 mph from the ENE, so the surface is going to be lumpy and won’t do that long-period energy any favors. It’s still a “marginal” call.
The water temp is sitting at 81°F with an anomaly of just 0.7° – so about average for the time of year. Not that it’ll matter much, because you’ll be fighting that chop.
Then from the 6th of September into the second week, things actually get bigger. Swell climbs to 6-7ft, even 10ft on the afternoon of Sunday the 6th, with energy jumping into the strong range (1435). But it’s all short-period, 8-9 seconds, wind-blown slop from the ENE and NE. The wind stays fresh at 19-22 mph. That kind of setup at a beach with this cross-shore chop? It’s more interesting for kite surfing than paddling. Definitely not a go for beginners, and even for the experienced guys it’s a messy, blown-out session. The recommendations stay at zero or one out of ten the whole way.
By the time you hit the 10th, the swell drops right down, back to 2ft, but the period stretches out to 15-18 seconds from the SSW. That’s all that nice long-period groundswell, but there’s no size and the wind is still playing up, so it’s not making anything happen.
Bottom line: it’s a 16-day stretch that’s basically a write-off. There are no standout days, no clean glassy windows, and the breaks are too inconsistent or blown out to call anything a proper score. It’s one of those periods where you just have to sit tight and hope the next forecast changes.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Sat night. Warm (max 27°C on Sat afternoon, min 24°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Wed night. Warm (max 27°C on Wed afternoon, min 24°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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) | S 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | S 16 | S 15 | ENE 7 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | ENE 7 |
Wave Graph | ||||||||||||||||||||
215 | 404 | 376 | 344 | 281 | 405 | 353 | 451 | 421 | 344 | 487 | 427 | 406 | 363 | 387 | 322 | 231 | 288 | 249 | 432 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 4:25PM0.55m | 5:07AM0.46m | 4:47PM0.49m | 5:58AM0.49m | 5:08PM0.42m | 6:57AM0.52m | 5:24PM0.35m | 8:09AM0.55m | 5:17PM0.30m | 9:35AM0.57m | 10:57AM0.61m | |||||||||
Low Tide | 10:52PM0.06m | 10:51AM0.15m | 11:17PM0.04m | 11:48AM0.20m | 11:45PM0.03m | 1:02PM0.26m | 00:18AM0.03m | 3:05PM0.29m | 1:01AM0.04m | 2:01AM0.05m | 3:24AM0.06m | |||||||||
— | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | |
6:55 | — | — | 6:54 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | |
mm | — | 3 | 1 | — | 3 | 2 | 1 | 1 | — | — | 2 | 2 | — | 6 | 1 | — | — | 1 | — | 2 |
Temp °C | 27 | 25 | 26 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 25 | 26 | 27 | 25 | 26 | 26 | 25 |
Feels °C | 26 | 25 | 25 | 26 | 25 | 25 | 25 | 24 | 25 | 25 | 24 | 26 | 27 | 25 | 25 | 26 | 24 | 25 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 12 | S 12 | S 12 | SSW 15 | SSW 15 | S 11 | SSW 19 | S 18 | S 18 | S 17 | S 16 | S 16 | S 15 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 |
215 | 141 | 100 | 100 | 196 | 191 | 82 | 391 | 314 | 314 | 373 | 427 | 406 | 352 | 268 | 243 | 176 | 176 | 215 | 162 | |
Swell 2 Height (m) Direction Period (s) | E 13 | SSW 17 | SSW 16 | SSW 16 | S 11 | S 11 | SSW 14 | S 10 | SSW 14 | S 12 | SSE 10 | S 10 | SSE 10 | S 11 | S 10 | S 10 | S 10 | E 14 | E 13 | E 13 |
125 | 186 | 171 | 162 | 89 | 82 | 180 | 74 | 115 | 105 | 34 | 53 | 31 | 86 | 75 | 50 | 56 | 142 | 170 | 165 | |
Swell 3 Height (m) Direction Period (s) | SSW 17 | E 12 | E 12 | ENE 11 | ENE 11 | S 21 | ENE 10 | SW 14 | S 9 | SW 14 | SW 14 | SSW 13 | S 12 | E 14 | E 13 | E 13 | E 12 | S 11 | SSW 20 | SSW 20 |
115 | 75 | 71 | 42 | 40 | 35 | 33 | 47 | 45 | 53 | 52 | 17 | 25 | 60 | 85 | 82 | 44 | 61 | 38 | 37 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | ENE 7 |
207 | 404 | 376 | 344 | 281 | 405 | 353 | 451 | 421 | 344 | 487 | 424 | 392 | 363 | 387 | 322 | 231 | 288 | 249 | 432 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 31 | 17 | 33 | 31 | 17 | 33 | 17 | 17 | 17 | 31 | 17 | 17 | 31 | 17 | 31 | 31 | 17 | 17 | 17 | 14 |
Best forecast wave conditions in Kaua'i | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Live Wind Speed (km/h)
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Information about the Kalapaki Beach Surf forecast
The above surf forecast table for Kalapaki Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kalapaki Beach can be found by selecting the local surf guide option on the grey menu. Our Kalapaki 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 (Kalapaki 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 Kalapaki 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.
Are you planning a vacation in Kaua'i? If you are looking for accommodation near Kalapaki Beach, camping, hotels and condos and appartments in Kaua'i, consider staying in Nawiliwili which is 1 km (1 miles) away. Alternatively, find information about places to stay and car hire in Lihue - Kauai which is 3 km (2 miles) away











