Sponge bay Surf Break

Lat Long: 38.70° S 178.06° E

Sponge bay Surf Forecast and Surf Report

Issued: 11 pm 20 Jul 2026 (local time)

Forecast update in  hr  min

Today's Sponge bay sea temperature is
12.8° C
1.6° 

Sponge bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Sponge bay surf forecast from 20 Jul 2026:

  • Best quality surf: Monday 27 Jul, 9PM (local time) - 10ft (3.0m), 9s period, S swell with cross-shore winds.
  • Most powerful swell: Tuesday 28 Jul, 6AM (local time) - 11ft (3.5m), 11s period, S swell with 3,036 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 21 Jul, 12PM (local time) - 5ft (1.5m), 16s period with SSE 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 21) at 12PM. The primary swell is predicted to be 1.5m and 16s period with a secondary swell of 0.5m and 11s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Sponge bay in the next 16 days are 3.5m 11s and forecast to arrive on Tuesday (Jul 28) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Saturday (Jul 25) at 12AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Tue 21st Jul)5ft (1.5m) 16s
Best Surf 9PM (Mon 27th Jul)10ft (3.0m) 9s
Most Powerful 6AM (Tue 28th Jul)11ft (3.5m) 11s

Table - best surf conditions forecast for Sponge bay over the next 16 days.


The Lowdown

Alright, let’s break this down in feet. Sponge Bay is showing some promise, but you gotta be picky.

The big story here is the groundswell – we’re seeing periods of 15 to 16 seconds, which is that long, clean energy that wraps in nicely. The first day is decent, then the ocean goes dead for a solid week, and then it comes back with a bang.

We fire up on Tuesday, July 21st. The morning has 5ft from the SSE, with a 16-second period, but the wind is cross. Wave energy is 1379 – solid. The real winner is Tuesday afternoon: 5ft of SSE swell, still 15 seconds, but the wind goes glassy. That’s as clean as it gets. Energy is 925. That’s the best of the first week.

Wednesday, July 22nd morning drops to 3ft, but with a cross-offshore wind and clean conditions, it’s a fun little wave. Energy is 300. By the afternoon, the wind shifts onshore and it’s done.

From Thursday, July 23rd all the way through Saturday, August 1st, it’s a flat spell. The swell drops below 2ft, the energy goes to double digits, and the wind is messy. For days on end, it’s not worth the paddle. A real dead zone.

Then the ocean turns back on. Sunday, August 2nd is the standout. The morning shows 4ft from the SSE, 12-second period, glassy wind. Energy is 470. But Sunday afternoon, August 2nd is the one to circle: 4ft of SSE swell, period back to 14 seconds, and *glassy* conditions. Energy jumps to 732. That’s long-period groundswell, no wind, clean lines. It’s going to be a beautiful session. The beach-and-reef setup will handle it well. Expect a few other folks out, because that’s a set-up that doesn’t stay empty.

Monday, August 3rd and after, the swell gets too big. 16ft and up, with onshore wind. That’s for the big dogs only, or the kite guys. For the average surfer, it’s a pass.

So, the best call is Tuesday afternoon, July 21st for the glass, but the absolute top pick of the whole 16 days is Sunday afternoon, August 2nd. Clean, glassy, good period, solid size. That’s the one.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 15°C on Thu afternoon, min 7°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 16mm), heaviest on Sun afternoon. Very mild (max 15°C on Fri afternoon, min 7°C on Sat night). Wind will be generally light.

Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
3
3
2
2
0
1
1
1
0
0
0
0
0
0
2
2
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
SSE
18
1.6
SSE
16
1.4
SSE
15
1.1
SSE
14
0.9
SSE
13
0.8
SSE
12
0.8
SSE
13
0.5
SSE
12
0.4
SSE
12
0.3
SSE
11
0.3
SSE
10
0.2
ESE
11
0.2
ESE
11
0.2
ESE
12
0.4
SE
17
2.2
SSW
8
0.9
ESE
14
0.9
ESE
13
2.3
S
8
Wave Graph
Metric surfscale
Energy kJ
2503
1310
856
421
257
167
189
85
56
23
19
12
12
15
76
634
293
317
609
Wind (km/h)
15
SW
10
W
5
SSE
15
NW
10
WNW
5
ESE
10
WNW
10
NNW
15
NNE
15
NW
10
NNW
15
NNW
20
NNW
25
W
30
WSW
15
WNW
15
NNE
20
W
50
SSW
Wind State
cross-on
cross
glassy
cross-off
cross-off
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross
cross-on
cross-off
cross-off
cross
on
High Tide
11:02PM2.08m
11:25AM1.98m
11:47PM2.03m
12:13PM1.94m
00:29AM1.96m
12:59PM1.88m
1:10AM1.87m
1:42PM1.82m
1:52AM1.78m
2:25PM1.76m
2:39AM1.70m
3:12PM1.71m
Low Tide
5:19AM0.54m
5:32PM0.59m
6:06AM0.56m
6:19PM0.64m
6:49AM0.58m
7:05PM0.70m
7:32AM0.62m
7:52PM0.75m
8:14AM0.67m
8:41PM0.79m
9:00AM0.72m
9:33PM0.82m
part cloud
clear
clear
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
rain showers
part cloud
clear
part cloud
light rain
heavy rain
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:18
7:18
7:16
7:16
7:16
7:15
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:08
5:09
5:09
5:10
5:12
5:13
 mm
1
4
11
17
Temp °C
11
9
10
9
10
11
9
12
15
10
14
15
13
12
13
8
10
9
8
Feels °C
7
7
8
6
8
9
6
9
11
6
9
11
8
5
6
2
7
4
0
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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