Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Mundial 2026 Grupos) Pick polygram.ink (preferred broker) |
54% | 46% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
54% | 46% | 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 |
|---|---|
| 38°C | 54% |
| 37°C | 45% |
| 36°C | 3% |
| 39°C | 2% |
| 32°C or below | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 40°C | 0% |
| 41°C | 0% |
| 42°C or higher | 0% |
Market context
Madrid's highest temperature on 17 August 2026 will be measured at Adolfo Suárez Madrid-Barajas Airport, with resolution determined by the Daily Observations table on Weather Underground rather than summary figures. The market currently shows 0% probability, suggesting traders expect the temperature to fall outside the upper range being priced.
August in Madrid typically peaks between 32–38°C, with historical data from the airport station showing that mid-August readings regularly exceed 35°C. The city experienced 39.6°C on 16 August 2023 and 40.5°C on 13 August 2022, establishing that extreme heat is not anomalous for this period. However, the 0% probability implies the market is pricing a specific upper threshold that historical August patterns suggest is unlikely to be breached on that particular date. Traders should examine the exact temperature bands offered; if the highest option is set significantly above the 35–37°C range typical for mid-August, the current probability reflects realistic seasonal constraints rather than exceptional conditions.
Monitoring European weather forecasts from late July 2026 will be essential, particularly high-pressure systems tracking across the Iberian Peninsula. Any Atlantic storm systems or cooler air masses moving into Spain in the fortnight before 17 August could suppress temperatures below historical norms. The airport station's measurement protocol and any maintenance schedules affecting the weather station should also be verified before settlement, as these could influence the recorded reading independent of actual atmospheric conditions.
Methodology
Football-specific comparison page for Pronóstico: Highest temperature in Madrid on August 17?. 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 (US-focused) or Manifold (play-money).
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.
FAQ
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- 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.
- Which sports markets are available?
- Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.
- How fast do sports winnings settle?
- Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.
- Can I import form data and lineups?
- This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.
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