Sea surface temperature charts

SST charts that turn temperature breaks into fishing decisions

Rigline draws sea surface temperature break lines, shows how long each has held, and forecasts where the edge will sit tomorrow, so you can judge a break before you burn fuel on it.

Free on iPhone. No subscription.

Illustration. The app shows live data for your water.

What this helps you decide

SST charts matter when tuna, mahi, wahoo, marlin, and bait are using temperature edges. Rigline keeps the chart workflow focused on what anglers need to decide: where the break is, how strong it is, how fresh the data is, and what other ocean layers support it.

In the app

  • Break lines with how long each has held, plus a forecast line for the next 24 hours
  • Water temp and temp anomaly layers beside currents, sea height, depth and hotspot scoring
  • Location guides that connect SST strategy to specific ports and regions

How anglers use it

  1. 1

    Find a fishable edge before committing fuel to a long offshore run

  2. 2

    Compare canyon, shelf, and blue-water temperature structure

  3. 3

    Pair temp breaks with currents and sea height to avoid one-layer decisions