Ruby Bay Surf Break

Lat Long: 41.21° S 173.09° E

Issued: 5 pm 04 Jul 2026 (local time)

Forecast update in  hr  min

Today's Ruby Bay sea temperature is
12.4° C

Slightly cooler than normal

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


Ruby Bay surf forecast from 4 Jul 2026:

  • Best quality surf: Sunday 5 Jul, 3AM (local time) - 5.5ft (1.7m), 9s period, N swell with glassy winds.
  • Most powerful swell: Sunday 5 Jul, 12AM (local time) - 7ft (2.1m), 9s period, N swell with 734 kJ wave energy.
  • Next surfable swell (1★+): Sunday 5 Jul, 3AM (local time) - 5.5ft (1.7m), 9s period with N swell.

Best Forecast Surf Conditions for Ruby Bay this week:

The surf forecast for Ruby Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jul 05) at 3AM. The primary swell is predicted to be 1.7m and 9s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Ruby Bay in the next 16 days are 2.1m 9s and forecast to arrive on Sunday (Jul 05) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 10s period and expected on Sunday (Jul 05) at 3AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sun 5th Jul)5.5ft (1.7m) 9s
Best Surf 3AM (Sun 5th Jul)5.5ft (1.7m) 9s
Most Powerful12AM (Sun 5th Jul)7ft (2.1m) 9s

Table - best surf conditions forecast for Ruby Bay over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Alright folks, Rusty here. Let's talk about Ruby Bay. Honestly, looking at the whole 16-day window, it’s a tough stretch. Ruby Bay is a sheltered point break that rarely breaks, and the forecast is mostly flat or small, with messy conditions. The water temp is sitting at 54°, which is about 1° cooler than average – nothing crazy, just a nippy winter feel.

We start off with a real bummer on Saturday, July 4th. The swell pushes to 7ft from the north, but it’s a short 7-second period with a cross-on wind at 12 mph. That makes for poor surf with a combined energy of 418 (moderate), but with that wind and chop, it’s a write-off.

The only flicker of hope arrives on Sunday, July 5th morning. Glassy conditions – calm wind, 4ft of north swell, period at 9 seconds. Combined energy is 210 (moderate). It’s surfable, but the comment says “very ordinary.” It's tiny, clean, and honestly your best bet for a paddle, but it’s not going to blow anyone away. It’s a beginner-friendly wave just to get wet. Crowds? Ruby Bay gets busy sometimes, but with surf this small, you might have it quiet.

After that, it’s a long dead run. From Sunday afternoon right through to Wednesday, July 15th, the swell drops way off – mostly under 0.3ft or flat. Winds are light and sometimes offshore or glassy, which is cruel because there’s just no wave. You’re looking at a 10-day stretch of basically nothing worth paddling out for.

Then for the second week, things tease a bit. On Thursday, July 16th, we see a pulse of north swell hitting 6ft in the morning, 8-second period, with glassy conditions – combined energy 368 (moderate). That could have been a standout, but the comment calls it “surfable but very ordinary,” and the afternoon jumps to 7ft with onshore wind – too big and messy for a sheltered point like this. That afternoon is really only for experts, and even then it’s questionable.

Friday, July 17th morning: 4ft north swell, 11-second period, light offshore wind (SW at 6 mph), combined energy 295. That’s clean and the longer period gives it some shape for a point break. It’s not huge, but it’s your best shot in the second week – still just a “very ordinary” call, so lower expectations.

The rest of the run into July 19th is tiny and cross-on. Not much to ride.

So the standout? If I had to pick, Sunday July 5th morning is the only truly clean, glassy session with a little bit of height. And then Friday July 17th morning, with offshore wind and a longer period, is your promising but less certain long-range option. Keep your eyes on that one, but don’t hold your breath.

Rusty.

Short Range Forecast

Heavy rain (total 60mm), heaviest during Mon night. Very mild (max 13°C on Sat afternoon, min 7°C on Sun night). Mainly fresh winds.

Days 5-7 Weather Summary

Some drizzle, heaviest during Wed morning. Very mild (max 13°C on Tue afternoon, min 7°C on Wed night). Wind will be generally light.

Sat
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2
N
7
2.1
N
9
1.2
N
9
1
N
8
0.6
N
8
1.1
SE
4
1.2
ESE
5
1.1
N
9
1.4
ESE
5
0.5
N
8
0.3
N
7
0.1
N
8
0.1
N
8
0.1
NW
18
0.1
NW
16
0.6
SE
4
0.1
NW
19
0.1
NE
4
0.1
NW
16
0.1
NW
16
0.1
N
20
Wave Graph
Metric surfscale
Energy kJ
418
734
210
142
44
46
72
199
80
31
10
1
1
0
0
10
0
1
0
0
8
Wind (km/h)
20
N
10
NW
0
W
5
WSW
10
SSW
10
SSE
15
SE
15
SSW
10
SW
10
SW
10
SSW
10
SW
5
S
10
SSW
10
SW
5
SSE
10
SSW
10
SSW
0
ENE
5
SSW
5
S
Wind State
cross-on
cross
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
off
off
glassy
off
off
glassy
cross-off
off
glassy
cross-off
glassy
High Tide
00:58AM3.91m
1:26PM3.63m
1:37AM3.85m
2:08PM3.55m
2:20AM3.78m
2:53PM3.49m
3:09AM3.68m
3:42PM3.45m
4:04AM3.59m
4:38PM3.42m
5:08AM3.55m
5:51PM3.42m
6:17AM3.58m
Low Tide
6:36PM1.00m
6:44AM1.12m
7:11PM1.06m
7:27AM1.15m
7:50PM1.17m
8:13AM1.20m
8:36PM1.31m
9:04AM1.26m
9:36PM1.43m
10:03AM1.33m
10:53PM1.46m
11:09AM1.37m
00:08AM1.38m
light rain
rain showers
rain showers
part cloud
part cloud
cloud
light rain
heavy rain
rain showers
part cloud
cloud
light rain
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:52
7:52
7:52
7:52
7:52
7:50
7:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:09
5:10
5:10
5:12
5:12
5:13
5:14
5:14
 mm
3
12
3
1
29
12
1
Temp °C
13
12
10
12
9
12
13
10
11
13
10
11
12
8
11
12
8
11
14
8
8
Feels °C
9
6
8
10
5
8
9
8
8
11
7
9
11
6
9
11
5
8
13
6
5
Swell 1
Height (m)
Direction
Period (s)
1.2
N
9
1
N
8
0.6
N
8
0.3
ENE
8
0.4
NW
16
1.1
N
9
0.6
N
8
0.5
N
8
0.3
N
7
0.1
N
8
0.1
NW
18
0.1
NW
16
0.1
NW
16
0.3
ENE
4
0.1
NW
18
0.1
NW
16
0.1
NW
16
0.1
N
15
Energy kJ
210
142
44
11
65
199
50
31
10
1
12
10
10
3
12
10
10
5
Swell 2
Height (m)
Direction
Period (s)
0.1
NW
18
0.1
NW
16
0.2
NNW
12
0.3
NNW
14
0.1
N
7
0.2
NNW
16
0.1
NW
16
0.1
NW
15
0.1
E
6
0.1
N
8
0.1
NW
13
0.1
E
8
0.1
NW
19
0.1
NE
4
Energy kJ
12
10
14
37
1
25
10
9
1
1
6
1
14
1
Swell 3
Height (m)
Direction
Period (s)
0.2
NNW
11
0.2
N
8
0.1
S
6
0.1
NE
4
0.1
N
20
0.1
NW
14
0.1
N
20
Energy kJ
12
5
1
1
8
8
8
Wind waves
Height (m)
Direction
Period (s)
2
N
7
2.1
N
9
1.1
SE
4
1.2
ESE
5
0.4
ESE
3
1.4
ESE
5
0.8
SE
4
0.5
SE
3
0.4
SSW
3
0.2
SSE
2
0.4
SSW
3
0.6
SE
4
0.4
SE
4
0.2
SSW
2
Energy kJ
418
734
46
72
4
80
24
6
3
1
3
10
3
1
Nearest Offshore or Glassy
Rating
(10 max)
2
1
1
1
1
1
5
1
1
1
3
3
3
4
1
4
4
3
4
4
4
Distance (km)
133
129
0
7
14
141
88
7
14
38
83
83
83
83
38
84
83
83
125
83
83
Best forecast wave conditions in Nelson - Tasman Bay
Rating
(10 max)
2
2
1
2
1
1
1
Best forecast wave conditions in New Zealand
Rating
(10 max)
3
4
2
4
5
5
6
5
5
4
4
4
3
4
4
4
4
4
4
5
4
Header Global
Rating
(10 max)
5
5
5
9
6
5
6
8
7
5
5
9
8
9
9
5
7
5
4
8
4
  • Map Icons:
  • Break
  • 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 Ruby Bay Surf forecast

The above surf forecast table for Ruby Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ruby Bay can be found by selecting the local surf guide option on the grey menu. Our Ruby 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 (Ruby 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 Ruby 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 Nelson - Tasman Bay? If you are looking for accommodation near Ruby Bay, camping, hotels and holiday cottages in Nelson - Tasman Bay, consider staying in Nelson which is 17 km (11 miles) away. Alternatively, find information about places to stay and car hire in Blenheim which is 80 km (50 miles) away

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