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Security report for windy.com

Windyty, SE · Technology · Sweden

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

68/100

Risk levelMedium

0–100, higher is better. How it is calculated

Windy.com is a professional weather forecasting platform specializing in interactive wind maps, weather radar, and detailed forecasts for various outdoor activities such as kiting, surfing, paragliding, and sailing. The platform offers worldwide animated weather maps with multiple forecast models and aviation weather data, positioning itself as a leading service in the weather technology sector. The business model appears to be freemium, with premium subscription options for enhanced features. Technically, the website employs modern web technologies including JavaScript and Leaflet.js for map rendering, optimized for both desktop and mobile platforms. The site is well-designed with good content quality and user experience, though accessibility features could be improved. Security-wise, the site enforces HTTPS and avoids tracking cookies and advertisements, using only anonymous analytics to respect user privacy. However, the absence of explicit privacy policies, terms of service, and contact information, along with missing WHOIS data, slightly reduces trustworthiness. Overall, Windy.com demonstrates a strong technical and business foundation with room for improvement in transparency and compliance documentation.

Scanned

This is an earlier scan of windy.com. View the latest report

NIS2 and GDPR posture

GDPR outside view
50/ 100 · Medium
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

6 findings rated critical or high. Fix these first.

  1. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

Need hands-on remediation? Email guard@offseq.com

Keep watching windy.com

This scan found 22 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
62
Security headers
30
Email security
87
DNS health
80
Network security
100
GDPR outside view
50
Average
68

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Windy.com holds a strong market position as a specialized weather forecasting service targeting outdoor enthusiasts and professionals requiring precise weather data. Its competitive advantage lies in the integration of multiple forecast models and aviation weather information, catering to niche user segments. The freemium business model allows broad user access while monetizing premium features. The company appears to be medium-sized and based in Sweden, with consistent branding and professional content. The lack of visible contact details and corporate registration information suggests a need for enhanced transparency to support business credibility and customer trust. The platform's ecosystem includes multiple subdomains for content delivery and user account management, indicating a mature digital infrastructure.

Security posture

Windy.com exhibits a mature security posture with enforced HTTPS and a strict no-tracking, no-advertisement policy, enhancing user privacy and reducing attack surface. The use of anonymous analytics further supports privacy compliance. However, the absence of explicit security headers in the HTML and lack of published security policies or incident response contacts represent gaps in security best practices. The missing WHOIS data raises concerns about domain registration transparency, which could impact trust. No vulnerabilities or exposed sensitive data were detected in the analyzed content. To elevate security maturity, Windy.com should implement and publish comprehensive security policies, add security headers, and provide clear incident response channels.

Recommendations

  1. Publish a comprehensive privacy policy and terms of service to improve transparency and compliance.
  2. Add explicit security headers such as Content-Security-Policy and X-Frame-Options to enhance protection.
  3. Provide clear contact information including security incident response contacts to build trust.
  4. Implement a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  5. Enhance accessibility features to improve usability for all users.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Windyty, SE
Description
Weather radar, wind and waves forecast for kiters, surfers, paragliders, pilots, sailors and anyone else. Worldwide animated weather map, with easy to use layers and precise spot forecast. METAR, TAF and NOTAMs for any airport in the World. SYNOP codes from weather stations and buoys. Forecast models ECMWF, GFS, NAM and NEMS
Key services
Weather radar, Wind and waves forecast, Animated weather maps, Spot forecasts, METAR, TAF, NOTAMs data, Multiple forecast models
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Leaflet.js, HTML5, CSS3
Platforms
Web, Mobile
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No tracking cookies
  • No advertisements
  • Anonymous analytics only

Analytics and tracking

Services
Anonymous analytics (custom)
Tracking level
minimal
Privacy practices
good

Advertising

Transparency
excellent

Site quality

Design
good
User experience
good
Content relevance
good
Navigation
good
Professionalism
good
Trustworthiness
high

Key observations

  1. Website is fully accessible with rich interactive weather map content
  2. No WHOIS data available, indicating possible privacy protection or registrar data issue
  3. No explicit privacy policy or terms of service pages found
  4. Cookie consent mechanism present with clear statements about no tracking cookies or ads
  5. No contact emails or phone numbers explicitly provided on the page
  6. Uses Leaflet.js for map rendering and custom JavaScript for UI
  7. No security.txt or vulnerability disclosure information found
  8. No visible security headers detected in HTML content
  9. Website uses HTTPS with good SSL configuration
  10. No advertising or tracking pixels detected
Technical notes

Notes

The website uses a modern technology stack with JavaScript and Leaflet.js for interactive map rendering, optimized for mobile and desktop platforms. The site loads map tiles from multiple subdomains, indicating a distributed content delivery approach. Performance is moderate with good mobile optimization. SEO is supported by proper meta tags and Open Graph data, though structured data like JSON-LD is absent. The site lacks a CMS indication, suggesting a custom-built platform. No major technical debt or deprecated libraries were detected. Opportunities exist to improve accessibility and implement additional security headers to reduce technical risks.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

Earlier scans of this domain

  1. 67/100 −2Medium30 findingsView report
  2. 69/100Medium29 findingsView report
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