Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
76% | 24% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
76% | 24% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 12°C | 76% |
| 13°C | 25% |
| 14°C | 1% |
| 6°C or below | 0% |
| 7°C | 0% |
| 8°C | 0% |
| 9°C | 0% |
| 10°C | 0% |
| 11°C | 0% |
| 15°C | 0% |
| 16°C or higher | 0% |
Market context
The key event is the afternoon peak at Wellington Airport, where the market will settle off the highest temperature logged in Weather Underground’s Daily Observations table, not the site’s headline high/low summary. The current crowd-implied 0% YES looks conservative against the live forecast picture: several short-range sources point to a cool, cloudy, breezy winter day, but still with a plausible midday lift into the low teens Celsius rather than anything extreme.[11][16][17]
Historically, Wellington’s August temperatures are tightly clustered, which makes small forecast shifts decisive. Climatology sources put typical August highs around 12°C to 14°C, with monthly averages near 12°C, and one market note from Polymarket flagged 12°C and 13°C as the dominant outcomes on similar setup. In that context, the market is usually driven less by broad seasonal warmth than by whether cloud cover, wind direction, and timing of showers allow a brief break above the forecast envelope.[2][10][11][12]
The main catalysts are the final local forecasts and any late-morning observation trends at Wellington Airport. Weather Underground’s daily table can be revised as observations come in, and the market rules explicitly wait for the following day’s first datapoint before freezing changes, so traders will watch whether the early readings sit closer to 10°C–11°C or edge towards 12°C–13°C. Forecasts from Met Office, AccuWeather, and Weather.com all lean towards cloud, showers, and brisk winds, which caps upside but still leaves a narrow path to a modestly higher realised maximum if conditions briefly improve around midday.[5][17][18]
Methodology
Sports-specific comparison page for Highest temperature in Wellington on August 11?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
UK Frequently Asked Questions
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- Can I bet on individual matches?
- Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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