
Surf Forecasts:
Sponge bay surf forecast from 3 Aug 2026:
- Best quality surf: Saturday 8 Aug, 12AM (local time) - 5ft (1.6m), 14s period, SE swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 9AM (local time) - 16ft (5.0m), 12s period, S swell with 6,301 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 12AM (local time) - 4ft (1.2m), 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 1.2m and 10s period with a secondary swell of 0.9m and 6s. 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 5.0m 12s and forecast to arrive on Wednesday (Aug 05) at 9AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Saturday (Aug 08) at 6PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 7th Aug) | 4ft (1.2m) 10s |
| Best Surf | 12AM (Sat 8th Aug) | 5ft (1.6m) 14s |
| Most Powerful | 9AM (Wed 5th Aug) | 16ft (5.0m) 12s |
Table - best surf conditions forecast for Sponge bay over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s be straight with you: the next couple of weeks at Sponge Bay are looking pretty ordinary. We’ve got a big pulse of swell coming through mid-week, but it’s going to be messy as all hell with strong onshore winds. If you’re looking for quality, you’re going to have to wait until the weekend, and even then it’s not going to be big, just clean. After that, it fades out into almost nothing. So, strap in.
The first bit of real surf shows up Tuesday morning, but it’s a write-off. There’s a moderate swell building out of the SSE at 4ft, but with a fresh onshore SSW breeze, it’s going to be lumpy and poor. That’s just a warm-up for the main event. Tuesday afternoon the swell jumps to 12ft from the south with an 11-second period, and the energy is cranking at 4388 – that’s strong. But again, the wind is cross-onshore and fresh, so it’s a complete mess. Not worth paddling out.
Wednesday is the real monster. Morning sees the swell peak at 16ft from the south with a 12-second period, and the energy is over 9000 – that’s very strong. But there’s a strong onshore breeze and rain showers. This is way too big and too blown out. Afternoon drops to 13ft but it’s still cross-onshore and bumpy. This is not surf for beginners, and honestly, it’s not surf for anyone unless you’re chasing a beating. That size and wind at a beach and reef setup like this is more interesting for kite surfing than paddle surfing.
Thursday morning the swell eases to 10ft from the south, but the westerly cross-onshore wind keeps it choppy. Still a mess. Thursday afternoon it drops to 6ft from the SSW, energy down to 1765, but it’s still cross-onshore and choppy. Marginal at best.
Now, here’s where things clean up. Friday morning, the wind swings around to a light cross-offshore out of the northwest. The swell is down to 5ft from the southeast with a 10-second period, and the energy is a moderate 680. The water temp is 56°, which is about normal for this time of year, a touch cooler than average. This is the standout of the whole window – small but clean, with that cross-off wind cleaning up the face. It’s the best you’ll get.
Friday afternoon stays clean, with a gentle cross-offshore from the ENE and a long-period 16-second SSE groundswell at 3ft. Long period for Sponge Bay is a bonus for shape, but it can also make it a bit straight at the beach breaks. Still, it’s clean and rideable.
Saturday morning looks similar – 5ft from the SE with a light cross-offshore wind. Clean, but the energy is dropping. Saturday afternoon is smaller, 4ft, still clean but the magic is fading. Sunday morning you’ve got 3ft of SE swell and a light cross-offshore – surfable but very ordinary.
After that, it’s a slow death. The swell drops below 3ft, and by mid-week next week we’re looking at 1ft and less. There’s a gap from around Monday the 10th through to the 16th where there is really nothing to ride. The energy just flatlines. There’s a small bump of 4ft from the south on the 12th, but that’s with a strong offshore wind and only 5-6 second period – junk. The 15th has a light offshore but the swell is only 2-2ft, so it’s tiny.
So the long-range stuff beyond Friday is all about promise, not power. The window of opportunity is really just Friday the 7th – keep that morning free. Friday morning is the standout: 5ft from the SSE with a light cross-off wind and moderate energy – clean and lined up. Friday afternoon is also decent, but the swell is smaller. After that, it fades away. Honestly, for a stretch this long, you’ve got to take what you can get. And this week, that’s not much.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Tue night. Very mild (max 15°C on Mon afternoon, min 5°C on Tue night). Winds increasing (light winds from the WNW on Mon afternoon, strong winds from the SSW by Tue night). | Days 5-7 Weather SummaryMostly dry. Very mild (max 14°C on Sat morning, min 6°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | ||||||||||||||
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) | SSE 10 | SSE 12 | SSE 15 | S 11 | S 11 | S 12 | S 12 | S 12 | S 11 | SE 11 | SE 10 | SE 10 | SSE 16 | SE 14 | SE 13 | SE 12 | SE 11 | SE 11 | SE 10 | SE 10 |
Wave Graph | ||||||||||||||||||||
220 | 233 | 491 | 2910 | 4380 | 6301 | 4901 | 3159 | 2301 | 792 | 290 | 388 | 532 | 988 | 576 | 414 | 242 | 166 | 127 | 122 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross |
High Tide | 9:43PM1.98m | 10:00AM1.91m | 10:23PM1.98m | 10:42AM1.92m | 11:05PM1.95m | 11:28AM1.91m | 11:47PM1.92m | 12:16PM1.90m | 00:32AM1.88m | 1:05PM1.89m | 1:22AM1.83m | 1:58PM1.86m | 2:20AM1.79m | |||||||
Low Tide | 3:24PM0.54m | 4:00AM0.54m | 4:05PM0.52m | 4:41AM0.50m | 4:47PM0.51m | 5:24AM0.47m | 5:31PM0.52m | 6:09AM0.46m | 6:20PM0.54m | 6:56AM0.45m | 7:14PM0.57m | 7:47AM0.47m | 8:12PM0.60m | |||||||
— | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | |
5:20 | — | — | 5:20 | — | — | 5:21 | — | — | 5:22 | — | — | 5:22 | — | — | 5:23 | — | — | 5:24 | — | |
mm | — | — | 3 | 2 | 8 | 2 | 2 | 3 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 10 | 8 | 7 | 7 | 9 | 8 | 8 | 9 | 10 | 8 | 9 | 10 | 10 | 14 | 14 | 12 | 14 | 13 | 12 |
Feels °C | 12 | 6 | 1 | -2 | -5 | -1 | -1 | 0 | 3 | 4 | 4 | 6 | 6 | 5 | 10 | 10 | 8 | 11 | 9 | 11 |
Swell 1 Height (m) Direction Period (s) | SSE 10 | SSE 12 | SSE 15 | SSE 11 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | SSE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 14 | SE 13 | SE 12 | SE 11 | SE 11 | SE 10 | SE 10 |
220 | 233 | 491 | 1475 | 2429 | 3146 | 2426 | 1597 | 860 | 730 | 290 | 388 | 292 | 988 | 576 | 414 | 242 | 166 | 127 | 122 | |
Swell 2 Height (m) Direction Period (s) | S 20 | SSE 18 | E 12 | E 12 | — | — | — | NE 18 | SE 15 | S 11 | SSE 6 | SSE 18 | SSE 16 | S 10 | SE 12 | SE 16 | SSE 15 | — | SSE 14 | SE 13 |
32 | 64 | 3 | 3 | — | — | — | 12 | 57 | 237 | 66 | 127 | 532 | 273 | 89 | 10 | 21 | — | 18 | 7 | |
Swell 3 Height (m) Direction Period (s) | SE 12 | E 12 | — | — | — | — | — | — | NE 11 | E 17 | SE 14 | S 18 | ESE 13 | SE 11 | SSE 16 | NE 13 | E 11 | SE 15 | NE 4 | E 12 |
6 | 3 | — | — | — | — | — | — | 4 | 6 | 30 | 165 | 66 | 125 | 90 | 7 | 2 | 8 | 1 | 11 | |
Wind waves Height (m) Direction Period (s) | — | — | SSE 7 | S 11 | S 11 | S 12 | S 12 | S 12 | S 11 | SSW 11 | — | — | — | — | — | — | NNW 2 | NE 4 | — | — |
— | — | 270 | 2910 | 4380 | 6301 | 4901 | 3159 | 2301 | 792 | — | — | — | — | — | — | 1 | 3 | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 19 | 1 | 119 | 118 | 125 | 138 | 133 | 115 | 53 | 43 | 0 | 0 | 0 | 0 | 2 | 3 | 0 | 0 | 43 | 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.











