Stormglass

stormglass.io ↗

Marine weather-data services

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SI Score: 60/100
Pricing: Freemium AI reading, not confirmed
Free plan: Yes AI reading, not confirmed
Sign-up required: Not confirmed

global weather

Ask SI about Stormglass

Answers use saved listing facts and recorded sources.

What it does

Stormglass provides marine-oriented weather data products for technical users.

Choose marine variables such as waves, currents, swell or water temperature. The plan table read on 26 October 2026 lists a free tier limited to ten requests per day and noncommercial use. Paid tiers have higher request allowances, and the API documentation covers parameters, sources and code examples.

Best for

Finding marine weather variables for technical applications

Sources

Weather API - stormglass.io (Oct 26, 2026)
Blog - stormglass.io (Oct 26, 2026)

SI Score

60/100

#14 in Weather

Based on published information. No hands-on task test.

Method 2.0 · Published source review Assessed Oct 26, 2026Score ceiling for this evidence: 84/100.

Product usefulness 60

Evidence

The marine/developer audience and variable/data routes support 60 for a specific application workflow. The homepage does not demonstrate complete query/output controls or plan and reuse boundaries.

Limits: AI review of saved source passages. No hands-on test, human approval or automatic-provider checker receipt.

Source links and check dates are in Sources and checks below.

Separate website checks

These checks do not add points to the SI Score. They inspect the website's HTML, not the product in use.

Basic website checksunknown

No check recorded.

HTML accessibility checksunknown

No check recorded.

Homepage HTML responseunknown

No check recorded.

Trackers in homepage HTMLunknown

No check recorded.

Page date hintsunknown

No check recorded.

Policy links do not verify a company's conduct. An HTML response time is not application speed. Tracker and accessibility checks miss behavior after page load. Copyright dates do not prove product upkeep.

How the SI Score works →

Unconfirmed details may be unassessed, absent from the pages checked or temporarily unreadable. A missing price does not mean the service is free.

Sources and checks

Supporting pages for product usefulness, site facts, prices and separate website checks. Each record keeps its own date. Reading a page does not establish how well the product performs in use.

stormglass.io/
- PricingAI reading, not confirmedChecked Oct 26, 2026
  Official plan table lists free and paid tiers.
- Free planAI reading, not confirmedChecked Oct 26, 2026
  Official table: free noncommercial tier, ten requests daily.
- APIAI reading, not confirmedChecked Oct 26, 2026
  The official public documentation explicitly identifies a weather-data API. Documentation was read; no endpoint was operated.
- Product usefulness evidenceChecked Oct 26, 2026
stormglass.io/blog/
- Product usefulness evidenceChecked Oct 26, 2026

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