Kaifu Rivermouth Surf Break

Kaifu Rivermouth Surf Forecast and Surf Report

Lat Long: 33.59° N 134.36° E

Issued: 2 am 07 Jul 2026 (local time)

Forecast update in  hr  min

Today's Kaifu Rivermouth sea temperature is
24.6° C

1.2°C colder than average for this time of year

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


Kaifu Rivermouth surf forecast from 6 Jul 2026:

  • Best quality surf: Friday 10 Jul, 6AM (local time) - 11ft (3.5m), 16s period, S swell with glassy winds.
  • Most powerful swell: Saturday 11 Jul, 12AM (local time) - 13ft (4.0m), 17s period, S swell with 9,426 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 7 Jul, 6AM (local time) - 3.5ft (1.0m), 13s period with SE swell.

Best Forecast Surf Conditions for Kaifu Rivermouth this week:

The surf forecast for Kaifu Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jul 07) at 6AM. The primary swell is predicted to be 1.0m and 13s period with a secondary swell of 0.8m and 16s. Another secondary swell of 1.1m and 6s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Kaifu Rivermouth in the next 16 days are 4.0m 17s and forecast to arrive on Saturday (Jul 11) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Tue 7th Jul)3.5ft (1.0m) 13s
Best Surf 6AM (Fri 10th Jul)11ft (3.5m) 16s
Most Powerful12AM (Sat 11th Jul)13ft (4.0m) 17s

Table - best surf conditions forecast for Kaifu Rivermouth over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Alright folks, Rusty here. Let’s get into it for this stretch.

The forecast kicks off nicely on Tuesday, July 7th, at Kaifu Rivermouth. We’ve got a bit of cloud cover, but that’s about it for drama. The water is sittin’ at 76.3°, which is a bit colder than normal for this time of year, so you might want a light spring suit if you’re sensitive. First thing Tuesday morning, we’re looking at a clean 3.3 ft swell out of the southeast, with a period of 12 seconds. The wind is glassy, just a whisper from the ESE at 3 mph. That’s the kind of morning that makes you grateful you dragged yourself out of bed. The combined swell energy is moderate at 817, and the conditions are calling for very good surf. The afternoon holds up nicely too, with the swell bumping to 3.6 ft and the period stretching to a juicy 16 seconds. Still glassy, still clean. This is the standout of the entire outlook, no question. Tuesday is your day.

Now, Wednesday the 8th through Saturday the 11th sees the swell pumping up, but it gets messy. We’re talking 6.9 ft to 13.1 ft of southerly and south-southeast swell, with periods hanging around 15 to 17 seconds. That’s a lot of energy—combined values between 2685 and up over 8300. But here’s the rub: the wind is onshore or cross-onshore for most of it, and the tide conditions look questionable. This is big, powerful, but unruly. For experienced surfers only, and even then, you’re dealing with a washing machine. If you’re a kiter, this setup might be more your speed than a paddle surfer’s dream.

Things settle down by Sunday the 12th. The swell drops to 5.6 ft out of the SSW, with a 14-second period. The wind goes glassy from the NE at 3 mph in the morning. That’s clean, but the combined energy is moderate at 1553. It’s a good session for experienced folks, but not a standout.

From Monday the 13th through to the end of the second week, it’s a bit of a mixed bag. The swell drops right off, mostly under 4.9 ft, with periods short to moderate. There are some glassy windows on the mornings of the 14th, 15th, 16th, 19th, 20th, and 21st—but the swell is small, and the energy is weak (often under 400). The 22nd of July shows a little promise: a 6.9 ft groundswell from the south, period of 14 seconds, combined energy 1735, and glassy conditions in the morning. That’s a distant look, but worth keeping an eye on. It’s about the only thing in the second week that might get the heart rate up, but it’s a long way off and uncertain.

Overall, if you can only surf once, make it Tuesday morning, July 7th. That’s the cleanest, most inviting session on offer.

Short Range Forecast

Mostly dry. Warm (max 26°C on Wed morning, min 23°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Fri morning. Warm (max 27°C on Fri morning, min 24°C on Fri night). Wind will be generally light.

Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
Sunday
12
Monday
13
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
3
3
3
4
4
3
5
5
5
7
5
4
5
4
2
2
2
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
SE
15
1.1
SE
16
2.1
SE
16
2.1
SE
15
2.3
SE
16
2.5
SSE
15
3
SSE
15
3
SSE
15
3
SSE
16
3.5
S
16
4
S
17
4
S
17
4
S
16
3.5
SSW
16
3
SSW
15
1.7
SSW
14
1.3
SSW
13
1.3
S
11
1.2
S
11
1.1
S
10
1
S
10
Wave Graph
Metric surfscale
Energy kJ
306
620
2009
1882
2453
2734
3469
3940
4819
6966
8317
9426
7387
6209
4022
1127
497
396
332
270
204
Wind (km/h)
5
ESE
5
S
5
SSE
10
SE
10
SE
0
SSE
10
SE
10
SSE
5
S
10
SE
10
SSE
5
S
5
SE
5
SE
5
SW
5
NE
5
SW
5
NNW
5
SE
10
S
5
WSW
Wind State
glassy
glassy
cross-on
on
on
glassy
on
on
glassy
on
cross-on
cross-on
on
on
glassy
glassy
cross
off
glassy
cross-on
glassy
High Tide
10:17AM1.42m
10:55PM1.60m
11:38AM1.36m
11:41PM1.58m
1:20PM1.35m
00:36AM1.58m
3:00PM1.43m
1:41AM1.60m
4:18PM1.55m
2:47AM1.65m
5:16PM1.67m
3:49AM1.73m
6:04PM1.75m
Low Tide
4:23PM0.66m
5:30AM0.68m
5:17PM0.83m
6:40AM0.57m
6:30PM0.98m
7:54AM0.44m
8:00PM1.08m
9:03AM0.28m
9:23PM1.10m
10:04AM0.12m
10:28PM1.08m
10:59AM-0.01m
11:22PM1.02m
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
thunderstorm
part cloud
part cloud
part cloud
part cloud
part cloud
thunderstorm
light rain
part cloud
rain showers
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:58
4:58
4:58
4:58
5:00
5:01
5:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:15
7:15
7:15
7:15
7:15
7:14
7:14
 mm
1
1
1
1
1
Temp °C
25
25
24
26
26
23
26
26
25
27
26
25
27
26
24
25
26
24
27
29
25
Feels °C
29
29
27
28
29
27
29
29
30
31
29
29
31
31
28
30
30
28
31
32
29
Swell 1
Height (m)
Direction
Period (s)
1
SE
12
1.1
SE
16
2.1
SE
16
2.1
SE
15
2.3
SE
16
2.5
SSE
15
3
SSE
15
3
SSE
15
3
SSE
16
3.5
S
16
4
S
17
4
S
17
4
S
16
3.5
SSW
16
3
SSW
15
1.7
SSW
14
1.3
SSW
13
1.3
S
11
1.2
S
11
1.1
S
10
1
S
10
Energy kJ
306
620
2009
1882
2453
2734
3469
3940
4819
6966
8317
9426
7387
6209
4022
1127
497
396
332
270
204
Swell 2
Height (m)
Direction
Period (s)
0.8
SE
15
0.9
ESE
8
0.6
SSE
20
1.1
SSE
18
1.2
SSE
18
0.8
ESE
5
1.1
S
20
1.8
S
16
1.3
S
20
0.3
SE
12
1.2
SSE
12
1.1
S
12
0.5
SW
12
0.4
SE
10
0.3
SE
10
0.4
ESE
9
Energy kJ
280
116
275
803
917
37
919
1751
1267
23
418
322
73
39
17
26
Swell 3
Height (m)
Direction
Period (s)
0.9
ESE
7
0.9
SE
12
0.3
ESE
8
0.7
E
8
0.1
SE
14
0.5
SE
11
0.4
SE
11
0.2
E
9
0.3
ESE
9
0.3
SE
10
Energy kJ
70
224
14
68
8
55
40
6
16
15
Wind waves
Height (m)
Direction
Period (s)
1.3
E
7
1.5
E
8
1.4
E
7
1.2
ESE
6
0.5
E
8
0.8
E
8
Energy kJ
161
266
209
112
34
84
Nearest Offshore or Glassy
Rating
(10 max)
3
3
4
4
4
4
4
4
5
7
9
9
6
5
5
4
3
2
2
2
1
Distance (km)
0
0
2
23
23
0
23
584
0
23
6
6
23
23
0
0
4
0
0
6
0
Best forecast wave conditions in Shikoku
Rating
(10 max)
3
4
4
5
4
5
5
5
7
9
9
9
5
5
4
4
3
2
2
2
Best forecast wave conditions in Japan
Rating
(10 max)
3
4
4
5
4
5
5
4
5
7
9
9
9
5
5
4
4
3
2
2
2
Header Global
Rating
(10 max)
7
5
5
9
8
9
7
7
6
6
6
5
5
4
5
5
4
9
7
5
7
  • 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 Kaifu Rivermouth Surf forecast

The above surf forecast table for Kaifu Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kaifu Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Kaifu Rivermouth 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 (Kaifu Rivermouth) 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 Kaifu Rivermouth 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.

Kaifu Rivermouth is 40 km (25 miles) from Muroto. If you plan a holiday in Shikoku, look for hotels and other accommodation in Muroto. Muroto has rooms for a wide range of budgets as well as car hire and transport links.

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