
Surf Forecasts:
Sponge bay surf forecast from 6 Aug 2026:
- Best quality surf: Friday 7 Aug, 3PM (local time) - 5ft (1.6m), 15s period, SE swell with cross-offshore winds.
- Most powerful swell: Friday 7 Aug, 6PM (local time) - 5.5ft (1.7m), 14s period, SE swell with 1,220 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 12AM (local time) - 5ft (1.6m), 10s period with SE swell.
Best Forecast Surf Conditions for Sponge bay this week:
The surf forecast for Sponge bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 07) at 12AM. The primary swell is predicted to be 1.6m and 10s period with a secondary swell of 0.5m and 13s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Sponge bay in the next 16 days are 1.7m 14s and forecast to arrive on Friday (Aug 07) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 9s period and expected on Wednesday (Aug 12) at 3PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 7th Aug) | 5ft (1.6m) 10s |
| Best Surf | 3PM (Fri 7th Aug) | 5ft (1.6m) 15s |
| Most Powerful | 6PM (Fri 7th Aug) | 5.5ft (1.7m) 14s |
Table - best surf conditions forecast for Sponge bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin’ at Sponge Bay.
Right off the bat, we’ve got a rough start. Thursday the 6th is a write-off with a messy 10ft S swell getting hammered by a cross-on wind. That’s a lot of water moving around, with combined energy of 3372, but it’s ugly out there. Gotta sit this one out. The water is sittin' at 56°, which is a bit colder than we’re used to for this time of year.
Things start to turn around Friday the 7th. The morning cleans up nicely with a light cross-off breeze and a 5ft SE swell, period 10 seconds. That’s a solid, clean combo (energy 895). The afternoon gets even better – a 5ft SE groundswell rolls in with a 15-second period. That’s proper long-period energy (1533), and with a clean cross-off wind, it’ll be excellent for the experienced crew. The wave shape will be good, but that long period means it’ll be a bit straighter at the beach, so keep your wits about you.
Saturday the 8th keeps the good vibes rollin’. Morning has a 4ft SSE swell (13-second period) with light NW winds – clean and glassy. Energy is 874. The afternoon drops a touch to 4ft but still clean with light winds. Sunday the 9th is a bit smaller, with a 3ft SE swell in the morning (energy 346), but the afternoon brings a 2ft SE swell with a 14-second period and offshore winds. That’s clean and glassy, but small.
Monday the 10th and Tuesday the 11th are tiny and weak. The swell drops to 2ft or less, with energy falling into the double digits. Not worth paddling out for. The week from there is a long, flat spell. From the 12th to the 17th, we’re looking at tiny waves, mostly under 2ft, and very low energy (down to 11). That’s a good week to wax the board and wait.
Then, out of the blue, we get a glimmer on Tuesday the 18th. The morning shows a 4ft SSE swell, 15-second period, offshore wind, and energy of 631. That’s clean, promising, and feels like the best wave of the whole run. But it gets a bit messy by afternoon, with a 5ft SSE swell but a cross-shore breeze and a marginal tide call. The strong winds then smash it on Wednesday the 19th, with 22 mph cross-on gusts making it lumpy and unrideable.
The standout session here is Friday the 7th afternoon. The 5ft SE groundswell with that 15-second period and clean cross-off wind is a classic window. It’s got the quality (1533 energy) and the clean conditions. The other real highlight is the morning of Tuesday the 18th – a bit further out, but a 4ft SSE swell with offshore wind and a 15-second period is a beauty on paper. Keep an eye on that one.
The Sponge Bay crowd can be there sometimes, so you might have a few mates out on the good days, but it’s not a circus.
Short Range ForecastMostly dry. Very mild (max 13°C on Sat morning, min 6°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 22mm), heaviest during Tue afternoon. Very mild (max 17°C on Mon afternoon, min 11°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 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) | S 11 | S 11 | SE 10 | SE 10 | SE 15 | SSE 14 | SSE 13 | SSE 12 | SE 11 | SE 11 | SE 14 | SE 13 | SE 11 | SE 10 | SE 13 | SE 12 | SE 11 | SE 11 | SE 10 | SE 10 | SE 9 |
Wave Graph | |||||||||||||||||||||
2324 | 969 | 560 | 363 | 1187 | 990 | 529 | 480 | 283 | 229 | 189 | 238 | 90 | 63 | 46 | 68 | 99 | 71 | 46 | 48 | 37 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | on | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off |
High Tide | 11:28AM1.91m | 11:47PM1.92m | 12:16PM1.90m | 00:32AM1.88m | 1:05PM1.89m | 1:22AM1.83m | 1:58PM1.86m | 2:20AM1.79m | 2:55PM1.84m | 3:29AM1.77m | 4:07PM1.85m | 4:46AM1.79m | 5:27PM1.91m | ||||||||
Low Tide | 5:31PM0.52m | 6:09AM0.46m | 6:20PM0.54m | 6:56AM0.45m | 7:14PM0.57m | 7:47AM0.47m | 8:12PM0.60m | 8:44AM0.49m | 9:16PM0.63m | 9:49AM0.51m | 10:31PM0.63m | 11:01AM0.49m | 11:47PM0.60m | ||||||||
7:05 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — | |
— | 5:22 | — | — | 5:22 | — | — | 5:23 | — | — | 5:24 | — | — | 5:25 | — | — | 5:27 | — | — | 5:27 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | — | 2 | 2 | 13 | 1 | — | — | — |
Temp °C | 9 | 10 | 7 | 9 | 9 | 9 | 13 | 13 | 11 | 14 | 16 | 14 | 16 | 17 | 15 | 13 | 13 | 14 | 17 | 18 | 13 |
Feels °C | 2 | 4 | 3 | 6 | 5 | 5 | 10 | 9 | 7 | 10 | 12 | 10 | 14 | 16 | 13 | 12 | 12 | 15 | 15 | 15 | 10 |
Swell 1 Height (m) Direction Period (s) | SSE 11 | SE 11 | SE 10 | SE 10 | SE 15 | SSE 14 | SSE 13 | SSE 12 | SE 11 | SE 11 | SE 10 | SE 13 | SE 11 | SE 10 | SE 10 | SE 12 | SE 11 | SE 11 | SE 10 | SE 10 | SE 9 |
991 | 791 | 560 | 363 | 1187 | 990 | 529 | 480 | 283 | 229 | 157 | 238 | 90 | 63 | 46 | 68 | 99 | 71 | 46 | 48 | 37 | |
Swell 2 Height (m) Direction Period (s) | SE 15 | SE 14 | SE 13 | SE 13 | SSE 10 | SE 11 | SE 16 | SE 11 | SSE 15 | SE 15 | SE 14 | NE 6 | ENE 3 | ENE 5 | SE 13 | SE 9 | NE 6 | ENE 6 | ENE 6 | ENE 5 | ENE 6 |
57 | 99 | 87 | 196 | 114 | 123 | 258 | 41 | 45 | 104 | 189 | 1 | 1 | 3 | 41 | 29 | 8 | 6 | 6 | 6 | 14 | |
Swell 3 Height (m) Direction Period (s) | NE 18 | NE 17 | S 20 | SSE 17 | SE 12 | NE 14 | SE 12 | NE 13 | SE 12 | E 13 | E 12 | E 12 | NE 5 | SE 14 | ENE 5 | ENE 6 | SSE 16 | S 14 | S 18 | E 10 | E 13 |
12 | 12 | 8 | 336 | 232 | 8 | 87 | 7 | 22 | 13 | 3 | 3 | 1 | 7 | 3 | 3 | 25 | 4 | 6 | 2 | 3 | |
Wind waves Height (m) Direction Period (s) | S 11 | S 11 | — | — | — | — | — | — | NE 3 | NW 2 | NNE 3 | — | NNE 5 | — | — | NE 6 | — | — | — | NE 9 | — |
2324 | 969 | — | — | — | — | — | — | 2 | 1 | 3 | — | 18 | — | — | 35 | — | — | — | 174 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 53 | 122 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 10 | 6 | 42 | 0 | 1 | 1 | 1 |
Best forecast wave conditions in Gisborne and Mahia | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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Information about the Sponge bay Surf forecast
The above surf forecast table for Sponge bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sponge bay can be found by selecting the local surf guide option on the grey menu. Our Sponge bay 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 (Sponge bay) 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 Sponge bay 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 holiday in Gisborne and Mahia? If you are looking for accommodation near Sponge bay, camping, hotels and holiday cottages in Gisborne and Mahia, consider staying in Gisborne which is 8 km (5 miles) away.











