
Surf Forecasts:
Sponge bay surf forecast from 13 Jul 2026:
- Best quality surf: Friday 17 Jul, 9PM (local time) - 5.5ft (1.7m), 15s period, ESE swell with cross-offshore winds.
- Most powerful swell: Tuesday 21 Jul, 12AM (local time) - 8ft (2.5m), 15s period, S swell with 2,930 kJ wave energy.
- Next surfable swell (1★+): Tuesday 14 Jul, 12AM (local time) - 1.5ft (0.5m), 9s period with ESE 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 Tuesday (Jul 14) at 12AM. The primary swell is predicted to be 0.5m and 9s period with a secondary swell of 0.3m and 13s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Sponge bay in the next 16 days are 2.5m 15s and forecast to arrive on Tuesday (Jul 21) at 12AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 5s period and expected on Tuesday (Jul 14) at 9AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 14th Jul) | 1.5ft (0.5m) 9s |
| Best Surf | 9PM (Fri 17th Jul) | 5.5ft (1.7m) 15s |
| Most Powerful | 12AM (Tue 21st Jul) | 8ft (2.5m) 15s |
Table - best surf conditions forecast for Sponge bay over the next 16 days.
G’day, I’m Rusty. Let’s look at what’s coming up for Sponge Bay. It’s a beach and reef setup, beginner-friendly, fairly consistent, and it likes swell from the SSE. The water’s sitting around 57°, which is about what you’d expect for this time of year – nothing weird there.
Honestly, it’s a slow start. The first few days are pretty ordinary. On Monday 13 July, there’s a tiny 3ft swell from the ESE with a 9-second period, and the energy is weak (141). The wind is offshore from the north, so it’s clean, but the waves are just too small and weak to get excited about. Tuesday morning 14 July drops to 1ft from the SSE with a long 12-second period but energy is barely there (63). Still clean, but you’d be hard-pressed to find a ride. The rest of that week stays small, with poor conditions and onshore or cross winds messing things up.
Now, the real standout comes on Friday morning 17 July. That’s the one. We’ve got a nice 5ft ESE swell rolling in with a long 16-second period, and the energy is pumping strong (1034). The wind is light and cross-offshore from the west, so it’ll be clean. This is groundswell, and on a beach and reef setup like Sponge Bay, those long periods can make the waves a bit straight, but with that size and direction, it’s going to be good. This is the best on offer – expect very good surf conditions. The afternoon turns poor as the wind swings onshore, so get out early.
Saturday 18 July morning is also a solid pick. Still 4ft from the ESE with a 14-second period, strong energy (1051), and the wind is light cross-offshore from the NNW. Clean again. The afternoon stays clean with a light offshore from the north (722 energy). That’s a full day of fun waves. Sunday 19 July goes downhill with strong onshore winds, so forget it.
After that, the second week gets messy. Monday 20 July sees a bigger 8ft S swell with a short 8-second period, but it’s onshore winds and the conditions are marginal. That’s more for experts if anything, but the wind is no good. Through the rest of the week, it’s a mix of onshore and cross-on winds, rain, and poor surf. There’s a bit of size around 5ft to 7ft but the wind is consistently from the east or southeast, making it choppy or lumpy. The energy is moderate to strong, but the quality just isn’t there. The last week really has nothing to offer.
So, to sum it up: Friday morning 17 July and Saturday 18 July are your best bets. Clean, solid groundswell, and good energy. The rest of the 16 days is mostly a write-off, so if you’re keen, plan for those two mornings.
Rusty.
Short Range ForecastSome drizzle, heaviest during Tue morning. Very mild (max 17°C on Tue afternoon, min 10°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 17°C on Thu afternoon, min 9°C on Fri night). Winds increasing (light winds from the SSW on Fri morning, fresh winds from the SSW by Sun morning). | ||||||||||||||||||||
Mon 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | ESE 9 | ESE 9 | SSE 12 | ESE 10 | ESE 10 | ESE 11 | ESE 10 | E 13 | ESE 15 | ESE 17 | ESE 16 | ESE 16 | ESE 16 | ESE 15 | ESE 14 | ESE 14 | ESE 14 | ESE 13 | SSE 18 | S 11 | S 10 |
Wave Graph | |||||||||||||||||||||
90 | 42 | 29 | 32 | 34 | 40 | 33 | 86 | 172 | 162 | 779 | 1003 | 1184 | 1067 | 732 | 595 | 522 | 321 | 318 | 941 | 1184 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross | cross-off | on | cross-off | cross-off | off | cross-on | on | on | on | on |
High Tide | 4:14PM1.90m | 4:47AM1.84m | 5:25PM1.93m | 5:56AM1.87m | 6:35PM1.99m | 7:00AM1.91m | 7:34PM2.06m | 7:58AM1.95m | 8:28PM2.11m | 8:53AM1.99m | 9:21PM2.12m | 9:45AM2.01m | 10:13PM2.11m | 10:36AM2.00m | |||||||
Low Tide | 10:33PM0.58m | 11:06AM0.44m | 11:47PM0.59m | 12:10PM0.44m | 00:58AM0.57m | 1:10PM0.44m | 1:58AM0.54m | 2:07PM0.45m | 2:51AM0.53m | 3:01PM0.47m | 3:41AM0.52m | 3:54PM0.50m | 4:31AM0.53m | ||||||||
— | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | |
5:02 | — | — | 5:04 | — | — | 5:04 | — | — | 5:05 | — | — | 5:06 | — | — | 5:07 | — | — | 5:07 | — | 5:07 | |
mm | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 13 | 15 | 17 | 13 | 15 | 16 | 13 | 14 | 17 | 13 | 13 | 13 | 10 | 14 | 15 | 12 | 11 | 11 | 10 | 11 |
Feels °C | 10 | 10 | 12 | 14 | 10 | 13 | 14 | 10 | 10 | 13 | 10 | 11 | 8 | 7 | 11 | 12 | 9 | 3 | 3 | 4 | 6 |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 8 | ESE 10 | ESE 10 | ESE 11 | ESE 10 | E 13 | ESE 15 | ESE 17 | ESE 16 | ESE 16 | ESE 16 | SSE 14 | ESE 14 | ESE 14 | ESE 14 | ESE 13 | SSE 7 | SSE 6 | SSE 10 |
90 | 42 | 26 | 32 | 34 | 40 | 33 | 86 | 172 | 162 | 779 | 1003 | 1184 | 1016 | 732 | 595 | 522 | 321 | 117 | 98 | 402 | |
Swell 2 Height (m) Direction Period (s) | S 10 | SSE 13 | SSE 12 | ENE 6 | E 12 | NE 4 | ESE 12 | S 19 | S 15 | E 13 | S 16 | S 6 | SSE 16 | ESE 15 | SSE 11 | SSE 9 | SSE 8 | S 18 | ESE 13 | ESE 12 | ESE 12 |
51 | 34 | 29 | 3 | 12 | 1 | 15 | 7 | 4 | 87 | 5 | 12 | 90 | 1067 | 319 | 127 | 50 | 240 | 257 | 230 | 164 | |
Swell 3 Height (m) Direction Period (s) | NE 11 | SSE 9 | E 10 | SSE 12 | NE 4 | S 9 | S 16 | S 16 | S 18 | S 18 | — | S 16 | — | — | — | — | SSE 23 | SSE 23 | SSE 18 | SSE 11 | SSE 19 |
5 | 16 | 8 | 14 | 1 | 2 | 5 | 5 | 6 | 6 | — | 19 | — | — | — | — | 170 | 176 | 318 | 183 | 274 | |
Wind waves Height (m) Direction Period (s) | — | NE 4 | NNE 5 | NNE 6 | — | — | — | — | NW 2 | — | SW 10 | — | S 6 | — | — | — | — | SSE 6 | S 7 | S 11 | S 10 |
— | 5 | 17 | 21 | — | — | — | — | 1 | — | 33 | — | 19 | — | — | — | — | 130 | 226 | 941 | 1184 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 3 | 3 | 3 | 4 | 3 | 1 | 3 | 1 | 0 | 43 | 0 | 0 | 0 | 3 | 68 | 121 | 10 | 10 |
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.











