Sea View — Matosinhos Beach

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

Ocean Viewing Index

Updated · Sep 8, 2026 17:41

Reference time: local noon · 13:45 (Europe/Lisbon)

Estimated
80
Good

Good conditions. Worth a visit.

Sub-Index Breakdown

Six dimensions feed the overall Ocean Viewing Index.

  • Sea Color
    Clear blue-green · hue
    74.1
  • Clarity
    Very clear (below 1.5 NTU) · NTU
    100
  • Visibility
    15+ m horizontal · m
    100
  • Sea State
    Calm, glassy (0-1) · Beaufort
    82.1
  • Lighting
    Low / harsh light · lux
    41.7
  • Water Quality
    index
    —

Sea Color

Observed Sep 8, 2026

Climatology
Blue — Clear
#2563eb
Turbidity
11.00 NTU
Chlorophyll
0.73 mg/m³

FU=5, hue=175°, Kd490=0.155

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
#0891b2

Cloudy/hazy conditions darken the apparent color

Noon13:45
Natural sea color
#2563eb

Cloudy/hazy conditions darken the apparent color

Afternoon15:00
Deep blue
#1e4d8c

Cloudy/hazy conditions darken the apparent color

Dusk18:00
Deep indigo (low light)
#1e4d8c

Cloudy/hazy conditions darken the apparent color

Local noon · 13:45 (Europe/Lisbon)

7-Day OVI Trend

Forecast ocean viewing conditions for the coming week.

Best on Thu: 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.