Ruby Bay Surf Break

Lat Long: 41.21° S 173.09° E

Ruby Bay Surf Forecast and Surf Report

Issued: 11 am 18 Jul 2026 (local time)

Forecast update in  hr  min

Today's Ruby Bay sea temperature is
11.3° C
1.5° 

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 18 Jul 2026:

  • Best quality surf: Friday 24 Jul, 12PM (local time) - 5.5ft (1.7m), 7s period, N swell with glassy winds.
  • Most powerful swell: Friday 24 Jul, 3PM (local time) - 6ft (1.9m), 7s period, N swell with 381 kJ wave energy.
  • Next surfable swell (1★+): Friday 24 Jul, 12PM (local time) - 5.5ft (1.7m), 7s 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 Friday (Jul 24) at 12PM. The primary swell is predicted to be 1.7m and 7s 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 1.9m 7s and forecast to arrive on Friday (Jul 24) at 3PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 5s period and expected on Friday (Jul 24) at 3AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Fri 24th Jul)5.5ft (1.7m) 7s
Best Surf12PM (Fri 24th Jul)5.5ft (1.7m) 7s
Most Powerful 3PM (Fri 24th Jul)6ft (1.9m) 7s

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


The Lowdown

Alright folks, Rusty here. Let’s be straight with you – it’s a quiet stretch ahead for Ruby Bay. This is a sheltered point that rarely breaks, and right now it’s living up to that reputation. The whole 16-day window is looking mostly flat, with only a few tiny bumps that won’t get you excited. We’re talking about a solid run of very small, poor surf from now until late July, with a few days of nothing at all.

Over the first week, from Saturday the 18th through to Friday the 24th, it’s a real struggle. There’s virtually no swell to speak of – most of the time the combined energy is sitting at zero or just a few points, with occasional tiny 0.3ft to 0.7ft waves. The water is a bit colder than normal for this time of year at 52°, which is a degree and a half off the average. A few glassy morning windows pop up, like Monday the 20th and Tuesday the 21st, but with no swell, it’s just a flat, pretty lake. On Friday the 24th afternoon, there’s a brief spike to 4ft, but it’s a short-period, 6-second windswell from the north, and combined energy is only 109 – still weak. The wind is light offshore, but the quality is poor, and it’s not enough to bother with.

Heading into the second week, from Saturday the 25th onward, it’s back to the same old story. Tiny 0.3ft to 1ft waves, mostly from the north, with periods all over the shop. The only faint glimmer is on Wednesday the 29th, when we see a glassy morning with a 1ft north-northeast swell and a period of 4 seconds – combined energy of 11 – and then a calm afternoon with 2ft north swell and a period of 5 seconds, energy at 20. Still, these are tiny, weak waves, and the break is so inconsistent, it’s barely worth a paddle. The rest of the month and into early August stays flat or near flat, with zero energy on many days.

Honestly, there isn’t a single standout session here. The best you could hope for is that rare glassy morning with a tiny ripple, but even then, you’d be surfing ankle-biters. For a spot that rarely breaks, a blank run like this is pretty normal. If you’re desperate, maybe keep an eye on that Friday the 24th afternoon, but don’t hold your breath. Forecasts can change, but right now, it’s a long wait.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 13°C on Sat afternoon, min 5°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Some drizzle, heaviest during Thu night. Very mild (max 13°C on Tue afternoon, min 6°C on Tue morning). Wind will be generally light.

Saturday
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.1
NW
16
0.1
NW
18
0.1
NW
18
0.1
N
10
0.1
N
11
0.3
ESE
3
0.1
N
11
0.2
N
10
0.1
N
11
0.1
N
10
0.1
N
10
0.1
N
10
0.2
N
5
0.1
N
8
0.1
N
8
0.1
N
7
0.6
NW
4
1.1
NW
5
1.3
N
6
1.9
N
7
0.9
NNE
7
Wave Graph
Metric surfscale
Energy kJ
0
0
0
2
2
1
2
9
2
2
2
2
2
1
1
1
16
55
124
381
79
Wind (km/h)
10
SW
5
WSW
15
SW
10
SW
5
NNE
5
SSE
5
S
5
NNE
5
SSW
0
SSW
5
W
10
SW
5
SSW
5
NE
5
SW
5
SW
0
NE
5
SSW
5
SSW
5
SE
5
SSW
Wind State
off
glassy
off
off
on
glassy
glassy
on
glassy
glassy
glassy
off
off
on
glassy
glassy
glassy
glassy
off
glassy
glassy
High Tide
12:54PM4.08m
1:09AM4.17m
1:36PM3.95m
1:51AM3.97m
2:17PM3.79m
2:36AM3.76m
2:59PM3.61m
3:23AM3.56m
3:44PM3.43m
4:16AM3.37m
4:38PM3.29m
5:17AM3.23m
5:49PM3.22m
Low Tide
6:42PM0.79m
7:05AM0.82m
7:19PM0.95m
7:48AM1.03m
7:57PM1.16m
8:33AM1.25m
8:41PM1.39m
9:23AM1.45m
9:39PM1.61m
10:19AM1.60m
10:59PM1.76m
11:20AM1.69m
00:16AM1.78m
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
part cloud
part cloud
cloud
cloud
light rain
light rain
light rain
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:47
7:47
7:46
7:45
7:43
7:43
7:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:20
5:21
5:21
5:22
5:22
5:23
5:24
 mm
1
1
3
1
Temp °C
12
13
9
13
12
10
11
11
8
11
13
8
12
12
8
10
11
9
10
10
8
Feels °C
9
11
5
12
10
9
9
9
6
10
12
6
10
9
6
8
9
7
9
9
6
  • 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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