Sea View — Momochi Seaside Park

Today's Ocean Viewing Index and the six sub-indices behind it.

Ocean Viewing Index

Updated · Sep 8, 2026 17:50

Reference time: local noon · 12:29 (Asia/Tokyo)

Estimated
81
Excellent

Excellent viewing conditions. Highly recommended!

Sub-Index Breakdown

Six dimensions feed the overall Ocean Viewing Index.

  • Sea Color
    Vivid turquoise / azure · hue
    82.2
  • Clarity
    Very clear (below 1.5 NTU) · NTU
    100
  • Visibility
    15+ m horizontal · m
    87.6
  • Sea State
    Choppy (4+) · Beaufort
    56.4
  • Lighting
    Good daylight · lux
    78.7
  • Water Quality
    index
    —

Sea Color

Observed Sep 8, 2026

Climatology
Blue — Clear
#1e5fa8
Turbidity
13.70 NTU
Chlorophyll
0.58 mg/m³

FU=4, hue=204.8°, Kd490=0.124

Sea color through the day

The FU index represents the inherent color around local noon (closest to the true sea color); perceived color varies slightly by time of day with light and weather.

Morning08:00
Soft green-blue
#0284c7

Cloudy/hazy conditions darken the apparent color

Noon12:29
Natural sea color
#1e5fa8

Cloudy/hazy conditions darken the apparent color

Afternoon15:00
Deep blue
#1e3a6e

Cloudy/hazy conditions darken the apparent color

Dusk18:00
Deep indigo (low light)
#1e3a6e

Cloudy/hazy conditions darken the apparent color

Local noon · 12:29 (Asia/Tokyo)

7-Day OVI Trend

Forecast ocean viewing conditions for the coming week.

Best on Fri: Viewing conditions are Excellent; aim for the golden hour just after sunrise or before sunset. Great for snorkeling and photography.

7-Day Sub-Index Forecast

Six dimensions of ocean viewing quality over the coming week.

Sea Color
Tue
Wed
Thu
Fri
Sat
Sun
Mon
Sea color (Forel-Ule scale) — empty block means no verified data.