Surf Forecasts:
Kalapaki Beach surf forecast from 15 Aug 2026:
- Best quality surf: Friday 21 Aug, 8AM (local time) - 2.5ft (0.7m), 17s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 8AM (local time) - 18ft (5.5m), 11s period, E swell with 6,268 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 8AM (local time) - 2.5ft (0.7m), 17s period with SW swell.
Best Forecast Surf Conditions for Kalapaki Beach this week:
The surf forecast for Kalapaki Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 8AM. The primary swell is predicted to be 0.7m and 17s period with a secondary swell of 0.4m and 9s. Another secondary swell of 1.6m and 7s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kalapaki Beach in the next 16 days are 5.5m 11s and forecast to arrive on Sunday (Aug 16) 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+) | 8AM (Fri 21st Aug) | 2.5ft (0.7m) 17s |
| Best Surf | 8AM (Fri 21st Aug) | 2.5ft (0.7m) 17s |
| Most Powerful | 8AM (Sun 16th Aug) | 18ft (5.5m) 11s |
Table - best surf conditions forecast for Kalapaki Beach over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s be straight with you. The next couple of weeks around Kalapaki Beach are going to be a bit of a mixed bag, and honestly, for the first stretch, it’s mostly about dodging the crud. We’ve got a lot of onshore and cross-onshore energy blowing through, which is going to chop things up. The swell we’re seeing is mostly short-period windswell, not the clean, lined-up groundswell we’d be stoked on. It’s going to be a bit of a grind, but there are a couple of windows later on that could turn it around.
We start off this Friday, August 14th. There’s a small 4ft south swell running, but it’s getting chopped up by a moderate NE breeze. It’s cross-shore, and there’s a bit of a cross-chop on it, so while there’s something to look at, the quality is just not there. The water temp is a pretty normal 80°, nothing weird there.
The weekend is a write-off, plain and simple. Saturday, August 15th, the swell jumps up, but it’s all this short-period ENE windswell. It’s bumpy and lumpy with a fresh cross-shore breeze, and it's just messy. Then Sunday the 16th gets properly blown out. We’re talking near gale-force cross-onshore winds and a big 16ft east swell. That’s a lot of raw energy (5295 in the combined energy reading), but it’s going to be a washing machine. Too big, too windy, and completely ugly. This is not a surf day, unless you’re a masochist. Maybe the kite crew will be having a field day, but for a paddle surfer, forget it. That big swell keeps things messy through Monday the 17th, so we’re just sitting on the beach for that.
Tuesday the 18th and Wednesday the 19th drop right off. We're back to tiny, dribbly cross-onshore slop with a bit of south in the mix. It’s basically flat and blown. Not worth paddling out for anything more than a float. The energy is weak, and the wind has a bad attitude. This is a good time to check your wax and fix your dings.
We get a small reprieve in the wind for Thursday the 20th, with a light breeze, but the swell is still tiny, around 2ft from the south. There's a long period to it, but it's just too small to do anything with. Then Friday the 21st and Saturday the 22nd stay small and cross-onshore. It's not great, just small weak lumps.
The following week starts similarly grim. From Sunday the 23rd through Wednesday the 26th, we have more poor surf, with small, choppy, cross-onshore conditions. There’s a pulse of ENE windswell on Monday the 24th that brings 6ft, but it’s still onshore and weak-period, so it will be a mess.
Okay, now let's talk about the one or two glimmers in the darkness. Mark your calendars for Thursday, August 27th and Friday, August 28th. We finally see the wind ease right off, getting light, and the swell direction swings around to the east with a longer period. The heights aren’t huge, around 4ft to 4ft, but that period jumps to 17-18 seconds. That is a proper groundswell, and with the light offshore wind, Kalapaki is going to clean right up. The energy reading jumps into the four-digit range (1435-1504), showing it has some push. It's still a bit cross-onshore, but with that light breeze, it will be glassy and lined up. This is the standout window. Go get some.
After that, Saturday the 29th looks like a slight drop back into the short-period stuff from the east, and the wind picks up a touch. It’s surfable but not as good as the days before. So, your best bet is to be patient, sit out the junk, and charge hard on the 27th and 28th. It’s a promise of a good time, not a guarantee, but it's the best thing we've got on the board.
That’s it from me. Keep your eyes on the horizon.
Rusty.
Short Range ForecastHeavy rain (total 43mm), heaviest during Sun morning. Warm (max 27°C on Fri afternoon, min 25°C on Fri night). Winds decreasing (near gales from the ENE on Sun morning, light winds from the E by Sun night). | Days 5-7 Weather SummarySome drizzle, heaviest during Mon afternoon. Warm (max 26°C on Mon afternoon, min 24°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Fri 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
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 14 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | E 10 | E 9 | E 8 | ENE 8 | ENE 7 | S 14 | S 13 | ENE 6 | S 13 | ENE 7 | ENE 7 | ENE 7 | SSW 18 | SSW 17 | SW 16 |
Wave Graph | ||||||||||||||||||||
496 | 526 | 801 | 1047 | 1785 | 5002 | 1590 | 686 | 368 | 305 | 229 | 165 | 119 | 114 | 136 | 113 | 151 | 207 | 195 | 278 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross | cross-on | cross | cross-off |
High Tide | 5:03PM0.59m | 5:36AM0.41m | 5:29PM0.52m | 6:32AM0.43m | 5:50PM0.44m | 7:34AM0.46m | 6:01PM0.36m | 8:46AM0.48m | 5:31PM0.30m | 10:06AM0.50m | 11:20AM0.53m | |||||||||
Low Tide | 11:35PM0.07m | 11:06AM0.12m | 00:00AM0.06m | 12:01PM0.20m | 00:26AM0.06m | 1:11PM0.26m | 00:55AM0.06m | 3:13PM0.30m | 1:28AM0.08m | 2:14AM0.09m | 3:21AM0.10m | |||||||||
— | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — | |
mm | — | — | 1 | 2 | 7 | 15 | 9 | 7 | 2 | 1 | — | — | — | — | — | — | — | — | — | 4 |
Temp °C | 27 | 25 | 26 | 26 | 25 | 25 | 26 | 26 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 24 | 26 | 26 | 25 |
Feels °C | 26 | 25 | 25 | 25 | 24 | 20 | 25 | 26 | 27 | 27 | 25 | 25 | 26 | 26 | 26 | 26 | 24 | 27 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 13 | S 13 | S 13 | S 12 | S 13 | ENE 8 | S 14 | S 12 | S 14 | S 13 | S 13 | S 13 | SSE 10 | S 12 | SW 16 | SSW 18 | SSW 17 | SW 16 |
496 | 394 | 280 | 219 | 222 | 150 | 157 | 541 | 334 | 150 | 229 | 165 | 119 | 114 | 63 | 69 | 130 | 207 | 195 | 278 | |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 13 | E 12 | S 16 | S 18 | S 17 | S 16 | SE 7 | SSE 6 | SSE 6 | SE 11 | SE 9 | SE 10 | SE 10 | S 12 | SSW 16 | SSE 9 | SE 9 | SSE 9 | SSE 9 |
21 | 27 | 76 | 46 | 98 | 143 | 181 | 140 | 50 | 35 | 30 | 21 | 47 | 46 | 69 | 103 | 31 | 22 | 32 | 32 | |
Swell 3 Height (m) Direction Period (s) | W 11 | W 11 | W 13 | SE 12 | WNW 12 | W 12 | SE 12 | S 14 | SE 11 | S 15 | SE 6 | SW 17 | SW 18 | WNW 12 | SW 16 | SE 9 | S 12 | S 11 | S 11 | S 11 |
22 | 21 | 29 | 24 | 49 | 25 | 35 | 289 | 30 | 150 | 9 | 76 | 80 | 28 | 129 | 22 | 44 | 40 | 23 | 23 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | E 10 | E 9 | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
429 | 526 | 801 | 1047 | 1785 | 5002 | 1590 | 686 | 368 | 305 | 227 | 140 | 113 | 97 | 136 | 113 | 151 | 173 | 151 | 178 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 31 | 31 | 31 | 31 | 31 | 299 | 133 | 126 | 126 | 126 | 31 | 31 | 31 | 17 | 31 | 17 | 17 | 31 | 16 | 14 |
Best forecast wave conditions in Kaua'i | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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











