smhi.se website review

67 files are served with short cache lifetimes, so returning visitors download them again (2.7 MB).

21 files block the first paint until they finish downloading. Deferring or inlining them could save about 1.6 s.

Your mobile performance score is 73 (desktop: 97). Pages that score under 90 lose visitors before the first paint.

About 190 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 450 ms faster on a phone.

About 46 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 150 ms faster on a phone.

1 image could be 52 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

Polyfills for old browsers add 33 KiB JavaScript that modern phones do not need.

1 third-party service load with your homepage (cdn-cookieyes.com), adding 30 KiB and 12 ms of main-thread time.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Real Chrome users on phones do not pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)). Google uses this in ranking.

The layout shifts by 0.347 while loading, so content jumps under the reader's thumb. Good is under 0.1.

For real visitors the layout shifts by 0.12 (75th percentile). Good is under 0.1.

Over the last 25 four-week periods to 2026-10-24, real Chrome visitors' largest content (lcp) went from 0.9 s to 1.4 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your largest element takes 3.2 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “Väder Hitta din väder­prognos Stockholm mycket moln 11° Vat…”. Most of its time is resource load delay (1.3 s).

Visually, the page fills in at 4.3 s (Speed Index). Good is under 3.4 s.

The first text or image appears after 2.0 s on a phone. Good is under 1.8 s.

4 images have no width and height attributes, so the layout jumps as each one loads.

Over the last 25 four-week periods to 2026-10-24, real Chrome visitors' tap response (inp) went from 224 ms to 230 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 3.1 MB in 96 requests on a phone: images 1.7 MB (22), scripts 671 KiB (25) and fonts 576 KiB (6). Under 2 MB keeps phones on slow connections fast.

6 images (221 KiB) are JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

By the Sustainable Web Design model, a visit to your homepage emits about 0.87 g of CO₂e: 104.4 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

No meta description, so Google writes its own snippet from whatever text it finds.

Your title is only 4 characters: “SMHI”. Between 30 and 65 characters leaves room to say what you do and for whom.

No structured data (JSON-LD), so Google can't show rich results such as your logo, ratings or FAQs.

There are 8 <h1> headlines (“Väder”, “Klimat” and “Kunskapsbanken”). One clear main headline is easier for people and search engines.

No Open Graph image (also missing: og:description), so links shared on LinkedIn, Slack or Facebook show no preview picture.

The homepage links to 52 pages on smhi.se and 14 external pages.

There is no Organization (or LocalBusiness) JSON-LD, so search engines and AI assistants have no machine-readable facts about who runs the site: its name, logo, profiles and contact details.

The HTML your server sends has 642 of the 1,080 words a browser shows. AI crawlers don't run JavaScript, so they miss the rest.

There is no https://www.smhi.se/llms.txt, a short Markdown guide to your key pages for AI tools (llmstxt.org). It is optional and few AI tools read it yet, so treat it as a cheap extra.

https://www.smhi.se/en, https://www.smhi.se/vader/prognoser-och-varningar/vaderprognos, https://www.smhi.se/vader/prognoser-och-varningar/varningar-och-meddelanden, https://www.smhi.se/vader/radar-och-satellit/radar-med-blixt, https://www.smhi.se/vader and https://www.smhi.se/vader/observationer/arstidskarta and 9 others have no meta description, so Google writes the search snippet from whatever text it finds.

We fetched 15 pages linked from your homepage (of 44 found) and read each the way a search engine does.

1 image is served at too low a resolution for sharp phone screens.

On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

We found no call-to-action buttons or links (such as “Book a demo” or “Get a quote”) anywhere on the homepage.

No testimonials, customer logos, ratings or customer counts on the homepage: nothing tells a new visitor that others already trust you.

No analytics or tag manager detected in the HTML, so you can't measure whether any of these fixes work.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 1,080 words of visible text.

Opening the homepage sets 2 cookies (measured from a US location before any click).

Loading the homepage contacts 2 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.